How to Choose a Torque Wrench

A torque wrench is one of those tools where guessing costs you more than buying the right one. Wheel nuts, caliper bolts, suspension hardware, drain plugs: they all have a spec, and hitting it matters more than most people think. This is how we'd narrow it down if you asked us which one to get.

Start with the torque you actually use

Look up the specs for the jobs you do most, then pick a wrench whose range covers them. Ideally your usual number lands in the middle of the range, not right at the bottom or the top. Click-style wrenches are generally most accurate in the middle-to-upper part of their rated range, so a wrench rated far beyond what you need isn't a bargain. It's just less precise on small jobs. Each TONE product page lists the torque range, drive size and accuracy (the models we checked are rated at ±3%), so compare those against the job.

One thing that trips people up: TONE lists torque in N·m. If your manual gives lb-ft, multiply by 1.356 to get N·m.

Pick the drive size

Roughly speaking, 1/4" drive suits small fasteners and low torque, 3/8" covers most engine bay and bracket work, and 1/2" is the usual choice for wheel nuts, brakes and suspension. Larger drives are for heavy-duty fasteners. Whatever you choose, make sure your sockets match the drive.

Which style fits how you work

Preset type. You set the torque with an adjustment tool and leave it. If you tighten the same fastener again and again, wheel nuts being the obvious example, this takes the guesswork out of it. See preset torque wrenches.

Adjustable type. You change the value as the job changes, which suits a general-purpose toolbox. These are in the main torque wrench collection.

Digital reading. Some TONE preset models have a digital-style display that shows the set value, which makes it easier to read and harder to set wrong.

Electronic (Digitorqon). These use an LED lamp, a buzzer and an LCD to tell you where you are against the target torque. Handy when you can't easily watch a dial. See Digitorqon wrenches.

Pokayoke. The name comes from the Japanese idea of mistake-proofing. These are built for work where a missed or wrong tightening isn't acceptable, and there are transmitter and receiver accessories for them. See Pokayoke wrenches.

Interchangeable head. One handle, several heads, so a single wrench covers more fasteners. The heads are in heads and accessories.

Looking after it

A torque wrench is a measuring tool, so treat it like one. Don't use it as a breaker bar, don't drop it, and follow the storage instructions in the manual for your model. TONE's own guidance is to have a torque wrench inspected about once a year or every 100,000 uses, and to treat a missing click as a sign it needs service. Rough handling or leaving it unused for a long time can also throw the accuracy off. TONE makes torque wrench testing machines for shops that want to check them in-house.

A note on wheel nuts

Always use the torque in your car's service manual or the wheel maker's recommendation. Tighten in a star pattern, in stages, and check them again after the first short drive. For track days, check them between sessions. If your wheels have narrow nut holes, a thin-wall socket will usually fit where a standard one won't, and protector sockets help keep nuts and wheels from getting marked up. Browse wheel and tire service tools.

Not sure which wrench suits your car or what you're doing with it? Send us a message with the job and the torque spec and we'll point you to the right one.