to an accuracy of + / 4 %, the TEKTON 3/8 in. Click Torque Wrench lets you work with confidence, eliminating guessing and the piece of land tendency to overtighten fasteners. Correctly tightening fasteners to a vehicle or equipment manufacturer 's torque specifications ensures parts properly secured without being damaged. somebody and easily to use, this wrench a changeful ratcheting head that drives fasteners in both directions and measures torque in the right-handed direction. To measure torque, the craved value on the handle scale -LRB- foot pounds or Newton meters -RRB- and begin tightening the fastener. When the predetermined torque value is reached, a true mechanistic operation at bottom the handle a click you can hear and feel, alerting you to stop applying force. Built for uniform performance and years of safe service, the mechanistic design does n't batteries, and the allsteel construction has no impressible parts to break or wear out.IMPORTANT : This wrench is shipped precalibrated and change to use. To maintain calibration, store at its lowest setting of 10 ft.lb. / 13.6 when not in use. Be to read and understand the operator 's practice session, including all safety information, before firstly use.Specifications : Range - ft.-lb. : 10-80 ft.-lb. Range - : 13.6-108.5 NmIncrement : 1 ft.-lb. -LRB- 1.36 Nm -RRB- : ± 4 percentLength : 14-1/2 inchRatchet : 24 toothCountry of Origin : TaiwanIncludes : -LRB- 1 -RRB- 3/8 in. drive torque wrench -LRB- 1 -RRB- Storage -LRB- 1 -RRB- Operator 's practice session with torque conversion chart .