Features and Benefits:Optimized for use with 1/2" drive impact wrenches;Laser etched markings for easy identification;Dual hole design and groove for easier attachment;Meets ASME Industry Standards;Ball detent design for superior impact socket retention;1/2" drive to 3/4" drive impact socket adapter;Optimized for use with 3/4" drive impact sockets;The MILWAUKEE? SHOCKWAVE Impact Duty? 1/2? Drive to 3/4? Drive Socket Adapter provides tool versatility and durability in high torque applications. This adapter converts 1/2? drive tools to be used with 3/4? drive impact sockets. Milwaukee engineered these adapters with forged steel for durability in high torque applications. The laser-etched size markings allow for easy size identification. The dual-hole design and ring groove make for easy adapter attachment and removal. All SHOCKWAVE Impact Duty? Socket Adapters meet ASME industry standards.