Use controlled screw tightening in the most widely used range of 1 850 nm for use in almost all areas of industrial manufacturing features adjustable torque wrench with square drive and integrated ratchet head function for controlled bi directional tightening 14 38 12 interchangeable mushroom head with ball locking device as per din 3120 a 6 3 a 10 or a 12 5 iso 1174 with 34 push through square drive with pin locking mechanism from model no 4550 55 acc to