General description US PRO INDUSTRIAL 10pc 1/2" Drive Impact Spline Bit Sockets Set includes sizes ranging from M4 to M18. This set is designed for durability and efficiency, making it an essential addition to any toolbox. Technical specifications Sizes: M4, M5, M6, M8, M9, M10, M12, M14 Tamper, M16 Tamper, M18 Tamper Drive Size: 1/2" Material: CR-V Socket Bit Material: S2 Bit Finish: Phosphate finish Item Code: 3435 Other information Supplied in a metal case