Irwin Tools 3567951C Single Bit Adapter Ball Lock, 2" Quickly converts any power drill or cordless screwdriver (even right-angle drills) to a powerful socket wrench Ball retention design for quick change applications. Fits sockets with 3/8-inch adapter Fits all power screw guns, cordless screwdrivers, variable speed power drills, and quick change adapters Spring-loaded ball bearing locks on to sockets Includes 1 each 1/2-inch hex shank to 1/2-inch socket connector at 2 inches long