Click vs Digital Torque Wrench: How to Choose and Use a Torque Wrench
Click, split beam and digital torque wrenches compared, how to pick drive size and range, and how to use a torque wrench correctly.
Quick answer: A torque wrench tightens a fastener to a set torque so it clamps the way the engineer intended. A click torque wrench is the shop standard: set it, pull until it clicks, stop. A digital torque wrench shows the reading on a screen and usually warns with a light, beep or vibration, which helps with low torque specs and record keeping. A split beam wrench is a click style that does not need to be wound back to zero after use. Choose by drive size and torque range first, then by style.
Why torque matters
Bolts work like springs. Tighten one too little and the joint can loosen or leak. Tighten it too much and you stretch the bolt, strip threads, crack a housing or warp a brake rotor. Wheel lug nuts, cylinder heads, suspension bolts, drain plugs and spark plugs all have published torque specs for that reason. A torque wrench is the only practical way to hit them repeatably.
Types of torque wrenches
Click torque wrench
You set the torque on the handle scale. When you reach it, an internal mechanism breaks over with a click you can hear and feel. Click wrenches are durable, fast and need no batteries. Examples include the Michael Pro 1/2 inch drive click torque wrench, 25 to 250 ft lb, the 1/2 inch, 10 to 150 ft lb version and the 3/8 inch, 10 to 80 ft lb version, plus the Omega Pro 1/2 inch adjustable torque wrench, 30 to 250 ft lb.
Split beam torque wrench
A split beam wrench also clicks, but it uses a beam instead of a coil spring, so it does not need to be backed off to the lowest setting for storage. The Michael Pro 1/2 inch drive flexible split beam torque wrench, 40 to 250 ft lb is one example.
Digital torque wrench
A digital wrench measures torque electronically and shows it on a display, often in several units. Many warn as you approach the target, which helps on small fasteners where a click is easy to miss. Flex head versions reach awkward bolts. Examples are the Michael Pro 1/2 inch flex head, 3/8 inch flex head, 1/2 inch fixed head and 3/8 inch fixed head digital torque wrenches.
Hydraulic torque wrench
For very large industrial bolts, hydraulic torque wrenches driven by a pump deliver torque far beyond any hand wrench. They are a separate category used in heavy equipment, energy and construction work.
Click vs digital torque wrench
| Feature | Click | Digital |
|---|---|---|
| Power | None needed | Batteries |
| Signal | Click and feel | Screen, plus light, beep or vibration on many models |
| Best for | Everyday shop work, lug nuts | Low torque specs, several units, documentation |
| Storage | Back off to lowest setting (coil spring types) | Turn off, remove batteries for long storage |
How to choose a torque wrench
- Drive size. 3/8 inch suits most engine and interior fasteners. 1/2 inch covers lug nuts, suspension and most chassis work. 3/4 inch and larger is for trucks and heavy equipment.
- Torque range. Torque wrenches are most accurate in the middle and upper part of their range. Pick a wrench whose range puts your common specs comfortably inside it, not at the very bottom. Many shops own two: a 3/8 inch for low specs and a 1/2 inch for high ones.
- Units. Make sure the scale reads in the units your service information uses, usually ft lb, in lb or Nm.
- Ratchet head. A fine tooth count makes it easier to work in tight spaces.
- Calibration. Ask how the wrench is checked and plan to have it verified on a regular schedule.
How to use a torque wrench
- Clean the threads. Dirt and rust change how torque turns into clamp load.
- Set the target torque on the scale or screen.
- Run the fastener down snug with a hand ratchet first.
- Hold the wrench by the handle grip, not the shaft, and pull smoothly at a right angle.
- Stop as soon as it clicks or signals. Do not pull again to check it.
- On wheels and multi bolt flanges, tighten in a star pattern in stages.
- Return a coil spring click wrench to its lowest setting before storing it.
Breaker bar vs torque wrench
A breaker bar is for loosening stubborn fasteners. A torque wrench is for final tightening. Never use a torque wrench to break bolts loose. It can damage the mechanism and throw off accuracy. Pair your torque wrench with a breaker bar such as the Michael Pro 1/2 inch drive, 24 inch breaker bar or the 3 piece breaker bar set, and see all wrenches and breaker bars.
Care and calibration
- Store the wrench in its case, away from drops and moisture.
- Do not use extensions or cheater bars on the handle.
- Have the wrench checked after a drop, and on a regular schedule.
- Keep digital wrench batteries fresh.
Related
See all torque wrenches, sockets and socket sets and tool sets. Our socket set buying guide covers drive sizes and impact sockets.
Frequently asked questions
What size torque wrench do I need for lug nuts?
Most passenger car and light truck lug nuts fall within the range of a 1/2 inch drive torque wrench. Check the vehicle spec and choose a wrench with that value well inside its range.
Is a digital torque wrench more accurate than a click wrench?
Not automatically. Both can be accurate when calibrated. Digital wrenches make the reading easier to see and record.
Should I store a click torque wrench at zero?
Store a coil spring click wrench at its lowest setting so the spring is not left compressed. Split beam wrenches do not need this.
Can I use a torque wrench to loosen bolts?
No. Use a breaker bar or ratchet to loosen, and keep the torque wrench for final tightening.
How often should a torque wrench be calibrated?
Follow the maker guidance. Many shops check wrenches yearly, or sooner with heavy use or after a drop.
