Description: Precision: The power drill socket features precise production and is compatible with most impact drivers, screwdrivers, electric hammers, etc. Easy assembly: The impact drill extension bar is easy to install and remove, not requiring any tool, convenient for users. Portable: The electric screwdriver adapter is compact and lightweight, easy to carry and store in the tool bag. Sturdy: The power drill extension bar adopts heavy-duty steel, which is wear-resistant, rustproof,and tough, not easy to break or deform. Wide applications: The power drill adapter is suitable for DIY furniture, woodworking, home decoration, repair, etc. Specification: Material: Steel. Color: Silver. Size: 1/4 Inch: Square Head Width: Approx. 6.3mm/0.25 inch; Hex Shank Width 6.35mm/0.25 inch; Length: Approx. 52mm/2.04 inch. 3/8 Inch: Square Head Width: Approx. 9.5mm/0.37 inch; Hex Shank Width 6.35mm/0.25 inch; Length: Approx. 54mm/2.12 inch. 1/2 Inch: Square Head Width: Approx. 12.5mm/0.5 inch; Hex Shank Width 6.35mm/0.25 inch; Length: Approx. 57mm/2.24 inch. Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: Type 1: 1 Piece 1/4 Inch Drill Socket. Type 2: 1 Piece 3/8 Inch Drill Socket. Type 3: 1 Piece 1/2 Inch Drill Socket. Type 4: 1 Piece 1/4 Inch Drill Socket. 1 Piece 3/8 Inch Drill Socket. 1 Piece 1/2 Inch Drill Socket.