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Mobile Mechanic Tool Storage That Holds Up
Mobile Mechanic Tool Storage That Holds Up
Mobile mechanic tool storage keeps your service rig faster, safer, and accountable. Build a layout that protects tools, prevents loss, and reduces downtime Read more...
Insulated Tools for Electricians That Work
Insulated Tools for Electricians That Work
Choose insulated tools for electricians with the ratings, inspection habits, and organized storage that keep live-work equipment ready and accountable. Read more...
ISO DIN Hand Tools for Professional Work
ISO DIN Hand Tools for Professional Work
ISO DIN hand tools help professional technicians expect consistent fit, strength, and performance. See what the standards mean in daily work every shift. Read more...
How to Source TAA Compliant Hand Tools for Work
How to Source TAA Compliant Hand Tools for Work
Specify TAA compliant hand tools with confidence. Verify country of origin, document each SKU, and build organized, contract-ready tool kits for teams. Read more...
Choosing an Impact Socket Set for Trucks
Choosing an Impact Socket Set for Trucks
Choose an impact socket set for trucks with the drive size, socket range, retention, and storage needed for reliable heavy-duty service work every day. Read more...
Best Torque Wrench for Mechanics in Real Shops
Best Torque Wrench for Mechanics in Real Shops
Find the best torque wrench for mechanics by matching drive size, range, accuracy, head access, and calibration needs to the work you do every day. Read more...
Why Petrol Is Cheaper in America Than in Britain
US petrol is around half the UK price. Compare pump prices per litre and per gallon, and see how much of the gap is fuel duty rather than fuel. Read more...
Tool Chest Foam Inserts That Keep Shops Moving
Tool Chest Foam Inserts That Keep Shops Moving
Tool chest foam inserts make missing tools obvious, protect your gear, and keep drawers organized for faster work, cleaner handoffs, and fewer delays. Read more...
TENG TOOLS TM079 MECHANICS SOCKET SET
Professional Automotive Tool Kits That Stay Organized
Professional automotive tool kits reduce downtime when every socket, wrench, and specialty tool has a defined place and is ready for daily service work. Read more...
How to Organize Mechanic Tools for Faster Work
How to Organize Mechanic Tools for Faster Work
Learn how to organize mechanic tools with a system that cuts search time, prevents missing pieces, and keeps your shop, truck, or bay ready every shift. Read more...
637 Piece Teng Tools Modular EVA Foam Kit
How a Modular Tool Storage System Saves Time
A modular tool storage system gives every tool a visible home, reduces search time, and grows with your cart, cabinet, case, or workbench. Built right. Read more...
Choosing the Right Mechanic Tool Kit With Case
Choosing the Right Mechanic Tool Kit With Case
Choose a mechanic tool kit with case built for daily service, with organized trays, durable tools, and room to grow as the job demands - daily shop work. Read more...
NUT DRIVER SET
How to Prevent Missing Tools in Your Shop
Learn how to prevent missing tools with visible storage, check-out rules, and daily resets that keep every technician productive on every shift in the field. Read more...
Melting Point of Metals and Alloys in °C and °F
A pure metal melts at a temperature. An alloy melts over a range, and the two ends of that range are where most heating jobs go wrong. Below are published melting points for thirty pure metals, plus solidus and liquidus for the alloys a workshop actually meets — brasses, bronzes, stainless grades and solders — in Celsius and Fahrenheit. Enter a temperature in °C to find the metals nearest to it Why a single number is usually the wrong answerPure metals have one melting point because there is only one... Read more...
Engine Size Conversion: Cubic Inches, Litres and cc
One cubic inch is exactly 16.387064 cubic centimetres, which makes a cubic inch 0.016387064 of a litre. That is why 350 cubic inches comes out at 5.735 litres rather than a round 5.7, and why a litre figure and a cubic-inch figure for the same engine almost never look like exact equivalents. The tables below run both directions across the displacements that actually turn up. Enter a value in cubic inches Where the factor comes fromThe inch is defined as exactly 2.54 cm, so a cubic inch is 2.54 cubed... Read more...
Hex Key Size Chart: SAE to Metric
Across the range where both standards exist, only six metric hex keys have an imperial equivalent inside a usable tolerance, and just three of those are at sizes you would meet on a normal job: 3.5 mm with 9/64", 4 mm with 5/32" and 8 mm with 5/16". Everything else is close enough to feel right and far enough to do damage. The chart below gives the exact gap for every size and, more importantly, which way it errs. Enter a size to find its closest listed equivalent Why a... Read more...
Car Battery Size Chart: BCI Group Dimensions
A battery group size is a case specification, not a performance one. It fixes the length, width and height of the box and where the terminals sit — nothing else. Two batteries in the same group can differ enormously in capacity and still both fit. The tables below list every passenger-car and light-commercial group as the Battery Council International publishes them, with the heavy-duty commercial groups after. Enter a BCI group number to find its case dimensions What a group number actually fixesThe group number answers one question: will it... Read more...
Sheet Steel Gauge to Inch and mm Chart
The table below is the Manufacturers’ Standard Gauge for UNCOATED sheet steel, and only that. A gauge number does not mean one thickness: 16 gauge is 0.0598 in in plain steel, 0.0635 in galvanised and 0.065 in aluminium. Confirm the material before you read a gauge number off a drawing, because the three scales are not interchangeable and nothing on the sheet tells you which one was meant. Enter a size to find its closest listed equivalent Gauge is a weight, not a thicknessThe Manufacturers’ Standard Gauge is defined by... Read more...
Metric to AWG Wire Size Conversion Chart
Metric conductors are sized by cross-sectional area in square millimetres and AWG conductors by a gauge number, and the two series were never designed to line up. No metric size has an exact AWG equivalent. The table below gives the closest gauge for each standard metric size and, separately, the nearest gauge that is not smaller — which is the one to use when the metric size was a requirement rather than a description. Enter a size to find its closest listed equivalent Two columns, because closest is not always... Read more...
Flat Head Screwdriver Size Guide
A flat blade is sized by two numbers, not one: the width of the tip and its thickness. This is the complete list of 25 flat screwdrivers in the range, ordered by blade width, with the Teng part number for each. Enter a size to find its closest listed equivalent Both numbers matter, and thickness is the one people ignoreWidth determines how much of the slot the blade spans; thickness determines how much of the slot depth it fills. A blade that is the right width but too thin sits... Read more...
Phillips Head Screwdriver Size Guide
Phillips sizes run from PH0 upward, and each covers a range of screw sizes rather than one. This is the complete list of 18 Phillips screwdrivers in the range, by tip size and blade length, with part numbers. Enter a size to find its closest listed equivalent Getting the size rightThe correct Phillips driver is the largest that seats fully in the recess without rocking. Too small and the tip bottoms out in the centre of the cross, contacting only where the recess is shallowest — which is precisely where... Read more...
Torx Head Screwdriver Size Guide
Torx drivers are numbered on a standard series, and the numbers do not describe a dimension you can measure and interpolate. This is the complete list of 12 Torx screwdrivers in the range, by tip size and blade length. Enter a size to find its closest listed equivalent The size series is a lookup, not a scaleTorx sizes step through a defined table of geometries, and the steps are uneven — the jump from one size to the next is small at the bottom of the range and much larger... Read more...
Tamper Proof Torx Screwdriver Size Guide
A tamper-proof Torx screw has a pin standing in the centre of the recess, and a standard Torx driver cannot enter it at all. This is the complete list of 7 tamper-proof Torx drivers in the range, with part numbers. Enter a size to find its closest listed equivalent What the pin doesThe recess is an ordinary Torx star with a solid post in the middle. A tamper-proof driver is the same star form bored down its axis to clear that post, so it engages the lobes exactly as a... Read more...
Impact Driver Bits: Size Guide
A hand impact driver converts a hammer blow into a sharp twist while pressing the tip into the screw, which is what frees a seized fastener no screwdriver will move. This is the complete list of 10 interchangeable bits in the range. Enter a size to find its closest listed equivalent How a manual impact driver worksInside the body is a helical cam. When the end is struck, the cam converts the axial blow into a short, violent rotation of the output square — typically a few degrees. Two things... Read more...
1/4 inch Drive Extension Bars: Size Guide
On a quarter-inch drive the extension bar is usually what makes a fastener reachable at all, because the ratchet head is small but the spaces are smaller. This is the complete list of 6 lengths, with part numbers. Enter a size to find its closest listed equivalent Pick the shortest bar that reachesEvery millimetre of extension adds twist between your hand and the fastener, and adds distance over which the socket can wander off line. On a small drive the bar is slender enough that the twist is genuinely perceptible:... Read more...
3/8 inch Drive Extension Bars: Size Guide
Three-eighths drive covers most of the work in a vehicle, and its extension bars are the ones that get used daily. This is the complete list of 5 lengths in the range, with the Teng part number for each. Enter a size to find its closest listed equivalent Length changes what the tool feels likeA short bar exists to lift the ratchet head clear of an obstruction beside the fastener, and it barely changes the feel. A long bar exists to reach past something in front of the fastener, and... Read more...
1/2 inch Drive Extension Bars: Size Guide
Half-inch drive is where the torque lives — suspension, hubs, driveshafts, anything torqued into the hundreds of newton metres. This is the complete list of 5 extension bar lengths in the range, with part numbers. Enter a size to find its closest listed equivalent At these torques the bar stores energyA half-inch bar under two hundred newton metres is a wound spring. When the fastener releases, that stored energy unwinds instantly and the handle moves further and faster than the hand holding it expects. Anyone who has barked their knuckles... Read more...
3/4 inch Drive Extension Bars: Size Guide
Three-quarter inch drive is plant and heavy-vehicle territory, where a dropped socket is a hazard rather than an inconvenience. This is the complete list of 6 extension bars in the range, with part numbers. Enter a size to find its closest listed equivalent Why safety-lock versions existA three-quarter inch socket is a substantial piece of steel, and the assemblies it works on are often overhead or at height — truck wheels, crane fixings, structural bolting. A spring detent that holds a socket adequately on a bench is not an adequate... Read more...
1 inch Drive Extension Bars: Size Guide
One-inch drive is the largest square in common industrial use, and the range is deliberately short — there are 2 extension bar lengths, listed below with part numbers. Enter a size to find its closest listed equivalent Why the range is smallA one-inch drive assembly is not selected for convenience, it is selected because a fastener requires torque no smaller drive can carry. That work is specified rather than improvised: an assembly line, a maintenance procedure or a structural bolting spec calls for a particular figure, and the tooling is... Read more...
3/8 inch Drive Wobble Extension Bars: Size Guide
A wobble bar lets the socket sit at a small angle to the bar, which is usually all that is needed to reach a fastener that is not quite square on. This is the complete list of 3 lengths in 3/8 inch drive. Enter a size to find its closest listed equivalent How the wobble actually worksThe drive end is machined with relieved corners so the socket can tilt a few degrees in any direction while the square still drives it. That is a much smaller allowance than a universal... Read more...
1/2 inch Drive Wobble Extension Bars: Size Guide
On half-inch drive a wobble bar reaches fasteners set slightly off the line of approach — suspension bolts behind a hub, manifold nuts under a heat shield. This is the complete list of 3 lengths, with part numbers. Enter a size to find its closest listed equivalent Small angle, high torque, real consequencesA wobble end is machined away at the corners of the square so the socket can tilt. That machining removes material from the part of the drive that carries the load, so a wobble bar is inherently a... Read more...
Universal Joints by Drive Size: The Full List
A universal joint lets a ratchet drive a socket that is not in line with it, which is often the difference between reaching a fastener and removing half an assembly to get at it. This is the complete list of 7, by drive size. Enter a size to find its closest listed equivalent What a universal joint costs youA single universal joint does not transmit rotation evenly. At an angle, the output speed rises and falls twice per revolution even though the input is steady, and torque varies inversely with... Read more...
Socket Drive Adaptors and Bit Couplers: The Complete List
An adaptor joins a drive of one size to a tool of another, and the only two facts that matter are what it accepts and what it drives. This is the complete list of 36, with both stated for every part. Enter a size to find its closest listed equivalent Stepping down is safe, stepping up is notA reducing adaptor puts a small socket on a big ratchet. The ratchet can deliver far more torque than the small socket was designed to take, and the socket has no way to... Read more...
Sliding T Bars: The Full List by Drive Size
A sliding T bar is a plain bar through a sliding head: pull it to one end for maximum leverage, centre it to spin a fastener with both hands. This is the complete list of 5 in the range, by drive size. Enter a size to find its closest listed equivalent Two tools in one barSlid fully to one side, the bar is a long lever with the socket at the end — effectively a breaker bar, with all the force applied on one side of the drive. Centred, it... Read more...
1/4 inch Drive 6 Point Metric Sockets: The Full List
Quarter-inch drive is the small-fastener range: interior trim, electrical, brackets, sensors and anything where a bigger ratchet simply will not fit. This is the complete list of 12 six-point metric regular sockets, with the Teng part number for each. Enter a size to find its closest listed equivalent What quarter-inch drive is forThe square drive is the weakest link in any socket assembly, and a quarter-inch square is deliberately the weakest of the common sizes. That is a feature. Working on 5 to 13 mm fasteners in thin brackets, plastic... Read more...
1/4 inch Drive 6 Point SAE Sockets: The Full List
Small imperial fasteners run in sixteenths and thirty-seconds of an inch, and the increments are fine enough that guessing does not work. This is the complete list of 9 six-point SAE regular sockets in 1/4 inch drive, with the Teng part number for each. Enter a size to find its closest listed equivalent Why the small imperial sizes are so close togetherAt the top of the range, imperial sizes step in sixteenths — an obvious difference you can see across a bench. Down here they step in thirty-seconds, so 7/32,... Read more...
1/4 inch Drive 6 Point Metric Deep Sockets: The Full List
Small nuts on long studs are common in exactly the places a quarter-inch ratchet has to work — clamp bands, sensor brackets, terminal posts. This is the complete list of 11 deep six-point metric sockets in 1/4 inch drive, with part numbers. Enter a size to find its closest listed equivalent The jobs that need a small deep socketHose clamp bands with a threaded worm screw, exhaust sensor brackets, battery terminal posts, alternator wiring studs and most panel-mounted terminal blocks put a small nut somewhere down an exposed thread. In... Read more...
Measurement Conversion Chart: Length, Mass and Volume
Every conversion on this page is exact. Not accurate to several decimal places — exact, because the imperial units have been legally defined in terms of metric ones since 1959, so an inch is 25.4 mm by definition rather than by measurement. This is the quick reference: the exact factor for each common pair, short tables at everyday values, and a route to the full chart wherever you need more rows than fit here. Enter a value in inches The exact factorsThe figures below are definitions, not measurements. That is... Read more...
1/4 inch Drive 6 Point SAE Deep Sockets: The Full List
Deep sockets in the small imperial sizes reach nuts on threaded rod, terminal studs and clamp bolts where a regular socket bottoms out. This is the complete list of 9 in 1/4 inch drive six point, with part numbers. Enter a size to find its closest listed equivalent Where small deep SAE sockets earn their keepImperial threaded rod is still the standard way to hang and brace things in a building, and the nuts on it are almost always run some distance down the thread. The same applies to older... Read more...
1/4 inch Drive External Torx Sockets: The Full List
External Torx is a male star head that a socket fits over — the inverse of the Torx recess, and a different tool entirely. This is the complete list of 5 E-Torx sockets in 1/4 inch drive, with part numbers. Enter a size to find its closest listed equivalent E numbers and T numbers do not correspondThis is the single most useful thing to know about the range. An E10 socket does not fit a T10 screw and has no relationship to it; the two series are numbered independently, and... Read more...
1/4 inch Drive Phillips Bit Sockets: The Full List
Phillips is the cross-head almost everything used before Torx, and it was designed to slip. This is the complete list of 4 Phillips bit sockets in 1/4 inch drive, with the Teng part number for each size. Enter a size to find its closest listed equivalent Cam-out is a feature, not a faultThe tapered flanks of a Phillips recess convert torque into an axial force that pushes the driver out of the screw. That was deliberate: on 1930s assembly lines with no torque control, a driver that ejected itself at... Read more...
1/4 inch Drive Slotted Bit Sockets: The Full List
Slotted bit sockets drive a flat-blade screw from a ratchet, which is the only way to keep a flat blade in the slot while applying real torque. This is the complete list of 3 sizes in 1/4 inch drive. Enter a size to find its closest listed equivalent The slotted head is the worst drive still in serviceEvery other recess is designed to capture the driver. A slot does the opposite: nothing holds the blade in place except the pressure you apply, and any misalignment lets the blade slide out... Read more...
1/4 inch Drive Pozidriv Bit Sockets: The Full List
Pozidriv looks like Phillips and is not, and using one on the other is the most common way a screw head is destroyed. This is the complete list of 3 Pozidriv bit sockets in 1/4 inch drive, with part numbers. Enter a size to find its closest listed equivalent Telling Pozidriv from PhillipsLook at the screw head, not the driver. A Pozidriv screw has four shallow lines radiating from the recess at forty-five degrees to the main cross — small, easy to miss under paint, and completely diagnostic. A Phillips... Read more...
1/4 inch Drive Torx Bit Sockets: The Full List
Torx bit sockets put a Torx driver on the end of a ratchet, which is the only practical way to apply real torque to a Torx screw. This is the complete list of 7 sizes in 1/4 inch drive, with the Teng part number for each. Enter a size to find its closest listed equivalent What the Torx form actually doesA Torx recess is a six-lobed star with rounded lobes, and the faces it drives against are close to perpendicular to the direction of rotation. A Phillips recess, by contrast,... Read more...
3/8 inch Drive 6 Point Metric Sockets: The Full List
Three-eighths drive is the size most work gets done on, and the six-point metric regular socket is the workhorse of that range. This is the complete list of 16 sizes currently in the catalogue, smallest to largest, with the Teng part number for each. Enter a size to find its closest listed equivalent Why 3/8 inch drive is the defaultA drive size is a compromise between how much torque the square can carry and how much room the tool needs. Quarter-inch drive runs out of strength somewhere around 25 Nm... Read more...
3/8 inch Drive 6 Point SAE Sockets: The Full List
SAE sockets are sized by the distance across the flats of the fastener in fractions of an inch. This is the complete list of 10 six-point SAE regular sockets in 3/8 inch drive, ordered smallest to largest with the Teng part number for each. Enter a size to find its closest listed equivalent Reading an SAE sizeA socket marked 9/16 measures nine sixteenths of an inch across the flats of the hex it fits — it says nothing about the thread, the bolt diameter or the drive. That last point... Read more...
3/8 inch Drive 6 Point Metric Deep Sockets: The Full List
A deep socket exists for one reason: to reach a nut that sits partway down a stud. This is the complete list of 16 deep six-point metric sockets in 3/8 inch drive, with the Teng part number for each size. Enter a size to find its closest listed equivalent When depth is the whole jobA regular socket bottoms out on the end of a protruding stud long before it reaches the nut. U-bolts, exhaust studs, shock mounts, battery clamps and almost anything on a bracket that was designed to be... Read more...
3/8 inch Drive 6 Point SAE Deep Sockets: The Full List
Deep SAE sockets reach nuts that sit down a protruding stud, sized in fractions of an inch across the flats. This is the complete list of 9 in 3/8 inch drive, with the Teng part number for each. Enter a size to find its closest listed equivalent Depth, and what it is really buying youThe useful measurement of a deep socket is not its overall length but how far a stud can protrude through the nut before the socket stops seating. On imperial hardware that clearance gets used up quickly:... Read more...
Tractor Tire Conversion Chart: Standard, Radial and Metric
Agricultural tyres are sold under three notations for the same tyre. Standard sizes use an X, radials use an R, and metric sizes replace the inch width with a millimetre width and add a series number. The conversion is a fixed mapping of nominal widths, and the table below gives every common size in all three. Enter a tractor tyre size to find its equivalents How the three notations relateA standard size like 16.9X38 gives the nominal section width in inches and the rim diameter in inches. The radial version... Read more...
Vintage Tire Size Conversion: How to Find the Modern Equivalent
Old tyre sizes do not convert to modern ones by any rule. What they convert by is overall diameter: match the height of the original within about three per cent and the speedometer, the gearing and the arch clearance all stay right. This page explains the three sizing systems and gives the computed overall diameter of every modern size likely to fit a 13, 14, 15 or 16 inch rim. Enter an overall diameter in inches to find modern sizes that match The three systems, and how to tell them... Read more...