Feature:1. These sockets can convert hex head drills into square head for firm and safe socket connection.2. With 1/4in, 3/8in and 1/2in square head, this power drill socket set will meet your various needs.3. Ideal for electric screwdriver and other handoperated electric drill that has hex socket or chuck.4. Made of high quality chrome, all the adapters are not easy to deform and durable for lng use.5. Small size and light weight enable convenient carrying and storage, also very easy to install.Specification:Item Type: Power Drill Socket SetProduct Material: CR-V+ ChromeSurface Treatment: Chrome PlatingShank Diameter: 1/4in Hex HandleSquare Head: Approx. 1/4in (6.35mm), 3/8in (9.5mm), 1/2in (12.7mm)Length: Approx. 52mm / 2in, 55mm / 2.2in, 59mm / 2.3in.Package List:3 x Power Drill Socket