Features and Benefits:Optimized for use with 3/4" drive impact wrenches;Dual hole design and groove for easier attachment;Laser etched markings for easy identification;Ball deten design for superior impact socket retention;Meets ASME Industry Standards;For use with Impact Sockets;Laser etched part number;Made with forged impact steel for durability in high torque applications;Pin-less design for increased durability;25 Degree Swivel for access In hard to reach places;The MILWAUKEE� SHOCKWAVE Impact Duty� 3/4 in. Drive Socket Universal Joint features a 15-degree swivel for access in hard to reach places and impact durability in high torque applications. The laser-etched size markings allow for easy identification of drive sizes. The dual-hole design and ring groove allow for easy Universal Joint attachment and removal. All SHOCKWAVE Impact Duty� Socket Universal Joints meet ASME industry standards.