Features:Material: ChromeVanadium steel suitable for heavy duty impacts drivers.Black oxide coating with bracket torque compression to meet standard operating conditions.Spring loaded ball bearings on each square head securely and locks into sockets to avoid slippage during usage. General Usage: This set is perfect for your impacts driver or drill, and allows you to replace your ratchet with a power tool. The 14 shank fits all quick change chucks as well as standard drill chucks. Suitable for a screwdriver or electric screwdriver handle tools drive sleeve and after use can be installed on the size of the original hexagonal polygons converted to square head size, which can be used to install the sleeve is a good accessory to convert. Suitable for quick change 14 chuck systems or directly into drill chuck. Change your hand socket set into a drivenSocket set. Package List:8pcsset x Socket Adapters