Unique Socket-Lok® Safety Retention System features a spring-loaded locking button for maximum socket retention and quick disassembly when used with our Williams® locking-button square drive tools and sockets. May also be used with all standard 3/4" drive tools. Sockets feature a deep chamfer on the drive end to speed insertion onto the drive tool. Chamfered ends provide easy engagement of the drive tool and fastener. SUPERTORQUE® recessed corners in socket end provide extra turning power. High-polished tools cleann easily and resist rust. Designed for quick engagement on both 6 and 12 point fasteners