Impact Control Adapter for Sockets is highly robust and specially designed to withstand the high power of impact drivers.\t S2 Modified Steel and an optimised heat-treatment process provide extra endurance for high performance.\t A reliable pin connection allows you to secure sockets and remove them by pressing the pin.\tThe external square drive enables sockets to be held in an internal square drive.\t 1/4” Hex shank for use with three-jaw drill driver chucks and hexagonal drill driver chucks.\tExternal square drive end. inch: 1/2 Length mm: 50 Shank: 1/4 external square