3Pcs Torque Wrench Set: 1/2" torque wrench: 20-160ft.lb, and the length is 16.53''/42cm; 3/8" torque wrench: 5-45ft.lb; and the length is 12.2''/31cm; 1/4" torque wrench: 20-240in.lb; and the length is 9.84''/25cm Material: The bike torque wrench is made of high quality CR-MO steel with black manganese phosphate coating, designed to withstand heavy-duty use and resist rust and corrosion, higher impact resistance, non-slip, and longer service life Instruction for Use: Pull down the locking knob and start setting the desired torque value, after that release the button and the locking knob will automatically spring back to lock the torque value and then you can start working Waiting for the work to finish, you can adjust the torque value to the lowest for next time. (The ‘click’ sound below 5 Nm is small and may not be easily noticeable) Precision Torque Range: The torque ratchet has ±3% calibration error range and can be fine-tuned to 0.1 nm. The digital scale is printed with laser etching and is clearly visible for permanent reading 72 Tooth Dual-Direction: The torque ratchet has a reversible feature, the toggle of the handle can be used in both clockwise and anti-clockwise directions and is matched with a quick-release button for quick installation and replacement removal Click Notification: When adjusted to a preset torque value, the wrench handle will "click" to alert you that the torque has been reached, thus preventing excessive damage Click torque wrench set ideal for repairing and assembling cars, bikes, motorbikes and DIY projects etc, extending the life of your project Easy to Carry: The bicycle maintenance tool kit comes in a sturdy, high-impact storage case, keeping your sockets organized and easily accessible, convenient storage and use WETT 3Pcs Torque Wrench Set, 1/4 & 3/8 & 1/2-inch Drive