This BGS TECHNIC Bit Socket Set with internal multi-toothing for XZN M4 - M16 consists of 8 fluted sockets on a metal rail. Three have a 6.3mm (1/4") square profile for M4-M5-M6, three have a 10mm (3/8") square profile for M8-M10-M12 and two have a 12.5mm square profile for M14-M16. Made from chrome vanadium steel, these sockets are corrosion resistant and provide durability for heavy duty use. With BGS Technic, German experts in the sector for almost 50 years, you can be sure of professional quality material. Benefits: Professional quality sockets Strong and durable sockets for intensive use Features: Bit sockets, 6.3 mm (1/4") square, internal multi-tooth outlet (for XZN) M4 - M5 - M6 Bit sockets, square 10 mm (3/8"), internal multi-tooth outlet (for XZN) M8 - M10 - M12 Bit sockets, square 12.5 mm (1/2"), internal multi-tooth outlet (for XZN) M14 - M16 Internal multi-tooth outlet Sockets for XZN With spline On metal rail Gross weight: 468 g Composition: Chrome vanadium steel Surface treatment: Chrome-plated, matt Dimensions (WxDxH): 17 x 7 x 7 cm Packaging: One set of BGS TECHNIC bit sockets for XZN - multiple teeth M4/M16 - 8 pcs - 5105Delivered in their original packaging