Feature:1. These sockets can convert hex head drills into square head for firm and safe socket connection.2. Made of high quality chrome, all the adapters are not easy to deform and durable for lng use.3. With 1/4in, 3/8in and 1/2in square head, this power drill socket set will meet your various needs.4. Ideal for electric screwdriver and other hand‑operated electric drill that has hex socket or chuck.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