The Norbar SL0 Fixed Head Torque Wrench is accurate to ±3% and features a high-quality 72 tooth ratchet, for use in confined spaces. Fitted with a push through square for left and right handed torque tightening. It's easy to set the torque, an unmistakable signal is given off when set torque is reached. The moulded grip aids correct hand location and operator comfort. Accuracy exceeds all international standards. Traceable calibration certificate supplied to satisfy ISO9000:2000 quality systems. This Norbar SL0 Fixed Head Torque Wrench has the following specification: Drive: 3/8in Square Range: 4-20Nm (40-180 lbf.in) Torque Radius: 144mm Ratchet Teeth: 72 Ratchet Type: Reversible Length: 220mm Weight: 0.4kg NOR11087