Klein Torque Wrench Ratchet With 1/2" Square Drive offers the user a rugged, industrial strength torque wrench able to withstand the rigors of professional use. With torque by feel, it's torqued to micrometer accuracy. The micrometer clicker torque wrench features a distinct breaking action when the set torque is reached. The breaking action and clicking noise is greatest at the upper part ofthe scale and it has a positive lock with spring loaded pull-down lock ring. The 57010 has a 1/2" square drive ratchet head that allows speedy torquing and operation in confined working areas and it torques to the right.