Adapter for impact wrenches from 1/4" to 1/2". Adapter for drivers with 1/4" socket to 1/2" socket inserts. The hardened core ensures maximum durability. The flexible torsion zone absorbs maximum torque and limits damage (only torsion tip). Special "Extra Grip" ribs provide even better hold of screws in the same position (only with certain screwdriver bits). Professional, high-quality screwdriver bits, torsion and torsion types with special "Extra Grip" ribs. Size 52 mm.