Big Horn 13226 1/4 Inch Adjustable Quick-Change Hex Shank Adapter for 13/64 Inch Countersink & Tapper Point Drill Bit (Shank only W/O Bit)
Universal 1/4-inch quick-change hex shank prevents slipping in standard chucks and is compatible with all 1/4-inch quick-change chucks, including impact drills.