Check the listing for details. 9Pcs Socket Adapter Drill Bits Set Hex Impact Driver Tools 1/4" 3/8" 1/2" Shank. Condition: New. Listed at 5.99 USD. 100% brand new and high quality - 9-Pieces Hex Shank Socket Adaptor with Magnetic Bit Holder- High Quality Chrome Vanadium Steel. - Hex Adapter for Square Drive - Make your woodworking easier - Perfect for impact driver or drill, and allows you to replace your ratchet with a power tool. - The 1/4" hex shank air impact driver sockets fit all quick change chucks as well asstandard drill chucks. - This impact driver drill set is suitable for a screwdriver or electric screwdriver handle tools (hexagonal hole or three-jaw chuck) Specificaton - 4-Pieces 1/4" adapter: 25mm length, 30mm length, 50mm length, 65mm length - 2-Pieces 3/8" adapter: 50mm length, 65mm length. This can be converted to 9.53mm square head; - 2-Pieces 1/2" adapter: 50mm length, 73mm length --- can be converted to 12.7mm square head; - 1-Pieces 2.5 Inch magnetic bit extension piece with a 1/4-inch bit end