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/51.6-291 lb-ft. Overall length 840mm. Calibration certificate included. Supplied in blow mould storage case.