This Norbar NorTorque(r) Adjustable Dual Scale Ratchet Torque Wrench is supplied with a 1/2in square adaptor. It has the following specification: Drive: 3/8in Square. Accuracy: 3%. Range: 12-60Nm (10-45 lbf.ft). Ratchet Diameter: 36mm. Length: 328mm. Weight: 0.7kg. The NorTorque(r) utilises Norbars proven mechanism and internal components, and incorporates them into a purposeful and attractive torque wrench to delight a wide range of users, from professional mechanics to hobby enthusiasts. The wrench offers a comfortable, robust single material handle which also contains an easy to set scale. Fine engineering ensures the wrench adjustment is both fast and fingertip light meaning you can do your job more efficiently. The sleek body tube finish was chosen for its robustnes.