Ratchet head is engraved with Nm and lb - in scales on the barrel of the wrench with a micrometer type sleeve, allowing accurate preset torque values to be set. When torque is reached the wrench produces an Audible click and a release of tension. Marked range: 65 - 450Nm/48 - 332 lb - ft. Overall length 840mm. Calibration certificate included. Clockwise right - hand thread torque application only. Supplied in blow mould storage case.