Tender For supply of 1/2 inch sq. drive ratcheting head, max. recommended working torque: 60 ft.-lbs with 70 nm torque wrench body, preset click type, interchangeable head permit ratcheting accuracy: plus/minus 4% (clockwise), plus/minus 6% (counter-clockwise) from 20% to 100% of full scale as per attached annexure - a .