Brotool torque wrench, 1/2" square drive. The required torque loads are set by turning the sleeve until the required setting is opposite the mark. All Britool 1/2in square drive torque wrenches indicate with touch, sound and sight when the required torque is reached. This Britool torque wrench range is distinguishable by a length independent mechanism, push through reversible mechanism and have a retractable adjustment mechanism which avoids accidental adjustment. The torque wrench complies with ISO 6789 and is supplied in sturdy plastic storage case.