Check the listing for details. 12pcs Drill Socket Adapter and Reducer Hex Extension Bit Set 1/4 3/8 1/2 Inch. Color: Black, Condition: New. Listed at 8.95 USD. This 12 piece Hex Shank Bit Driver Extension Bar Set is designed to meet a variety of needs. Fits snugly and securely in your drill chuck or hand held driver. Consisting of your most common bit sizes 1/4", 3/8", and 1/2" changing shank sizes.High Quality: Made of premium chrome vanadium steel, heat treated for superior strength and coated with a black phosphate finish to protect against rust and corrosion.Spring loaded ball bearings on each square head securely and locks into sockets to avoid slippage during using.Professional grade universal socket adapter, self adjusting universal repair tools. Can be used in automotive industry, household maintenance, manufacturing industry, construction.Great for the DIY, Automotive Repairs, Household Maintenance, and most general repairs. A great tool addition to any tool box set. Features:Type: Socket Adapte Bits SetColor: BlackMaterial: Chrome Vanadium SteelPcs/set: 12PcsDIY Supplies: WoodworkingUse: Wood Drilling4pcs Reducer and Impact Adapter Set Size:1/4 "(6.3mm) square socket X 3/8" (10.0mm) outer square3/8 "(10.0mm) square socket X 1/4" (6.3mm) outer square3/8 "(10.0mm) square socket X 1/2" (12.5mm) male square1/2 "(12.5mm) square socket X 3/8" (10.0mm) outer square3 Pcs The Longest Extension Bar Size:1/4"Hexagon shank can be converted into 1/4"Square(67mm)£¬1/4"Hexagon shank can be converted into 3/8"Square(67mm)£¬1/4"Hexagon shank can be converted into 1/2"Square(73mm)3 Pcs The Middle Extension Bar Size:1/4"Hexagon shank can be converted into 1/4"Square(50mm),1/4"Hexagon shank can be converted into 3/8"Square(50mm),1/4"Hexagon shank can be converted into 1/2"Square(50mm)2 Pcs The Shortest Extension Bar Size:1/4"Hexagon shank can be converted into 1/4"Square(25mm),1/4"Hexagon shank can be converted into 1/4"Square(30mm)Package Includes:12Pcs/set x Socket Adapters