made of hardened chrome vanadium steel and chrome-faced, resistance, .Spring-loaded ball detent keeps your sockets locked into place, not easy to fall off.Very suitable for industrial, mechanical, and construction projects.Complete model,allowing you to arbitrarily switch 1 / 2,3 / 8,1 / 4 three model sockets.Application: Suitable for use in auto repair shops, 4S shops, CNC machine tools, construction sites and most pneumatic scenes and power toolsPlease note:Slight color difference or difference in kind, does not affect the use, please do not mind, thank you!Name: Sleeve AdapterColour:SilverMaterial:Chrome Vanadium SteelPackage Contents:6x Socket Converter AdaptorOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.