to an accuracy of + / 4 %, the TEKTON 1/2 in. Click Torque Wrench lets you work with confidence, eliminating guessing and the communal tendency to overtighten fasteners. Correctly tightening fasteners to a vehicle or equipment manufacturer 's torque specifications ensures parts properly secured without being battered. elemental and casual to use, this wrench a reversible ratcheting head that drives fasteners in both directions and measures torque in the clockwise direction. To measure torque, the coveted 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 reliable mechanical operation inside the handle a click you can hear and feel, alerting you to stop applying force. Built for consistent performance and years of reliable service, the mechanical design does n't batteries, and the allsteel construction has no integrative parts to break or wear out.IMPORTANT : This wrench is shipped precalibrated and ready 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 extremity, including all safety information, before archetypal use.Specifications : Range - ft.-lb. : 10-150 ft.-lb. Range - : 13.6-203.5 NmIncrement : 1 ft.-lb. -LRB- 1.36 Nm -RRB- : ± 4 percentLength : 18-3/8 inchRatchet : 24 toothCountry of Origin : TaiwanIncludes : -LRB- 1 -RRB- 1/2 in. drive torque wrench -LRB- 1 -RRB- Storage -LRB- 1 -RRB- Operator 's extremity with torque conversion chart .