This torque wrench has a ratchet mechanism with a reversing lever for clockwise and anticlockwise rotation. Very secure socket holding with push button release. A clearly audible click signal when the selected torque is reached. Extremely high accurracy to ISO 6789 standards. The MC100 has a 3/8" (10mm) square drive. Length 430mm. Torque range of 20-100Nm. Particularly suitable for motorcycles and small car engines. Storage case supplied.