18991 3/4 inch impact wrench CrMo 41 mm, length 90 mm, Proline Impact wrench supplied in box, Proline They work together with pneumatic equipment designed for use in difficult conditions and changing loads. Manufactured from durable chrome molybdenum steel (CrMo) for longer life, 2X tensile strength and 3X tensile strength. Higher yield strength than conventional sockets made of chrome vanadium tool steel. The PROLINE socket has specially profiled curves in the blunt corners between the working planes - the PRO-DRIVE system enables an increaseThe PRO-DRIVE system allows torque to be increased without damaging the wall of the socket to prevent excessive point loads accumulating in the corners between the teeth of the socket and the screw. Increases the durability of the cover and protects the edges of the unscrewed screw. The square sockets are compatible with most locking mechanisms of reliable pneumatic devices. Socket spanner L: 90 mm.