ITEM NAME:3Pcs Hex Drill Bit Socket Adapter 1/4" 3/8" 1/2" Drive Electric Impact Driver AS.3pcs Set Socket Adapter Hex Shank to 1/4" 3/8" 1/2" Impact Drill Bits. (1/4" hex shank to 1/4" socket) Socket Adapter, Length: 65mm. The 1/4" hex shank fits all quick change chucks and standard drill chucks.