This Draper 3/8" square drive reversible ratchet torque wrench features a range of 10-80 Nm (88.5-708 in-lb) and an overall length of 280mm. Model 34570. It includes a calibration certificate and is supplied in a blow mould storage case. The Nm and lb-in scales are engraved on the barrel, and the micrometer-type sleeve allows for accurate preset torque values to be set. When the set torque is reached, the wrench produces an audible click and a slight release of tension.