Fashion design,100% Brand New,high quality! Quality is the first with best service. customers all are our friends. Package:3/8/14Pcs Size:8pcs:3-7.3cm 3pcs-short:5cm 3pcs-long:6.5-7.3m 14pcs:7.3-8.2cm Material:Tool steel Features: This set is perfect for your impact driver or drill, and allows you to replace your ratchet with a power tool. The 1/4hex shank fits all quick change chucks as well as standard drill chucks. Suitable for a screwdriver or electric screwdriver handle tools (hexagonal hole or three-jaw chuck can) 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 1/4chuck systems or directly into drill chuck. Change your hand socket set into a driven socket set. The hexagon shaft fits all quick-change adapters and extensions, drill chucks A spring-loaded stainless steel tensioning ball holds the socket in place Hardened chrome vanadium steel alloy with excellent strength and durability The product is easy to install and remove, not easy to fall off when in use. Rust, non-slip, high bite force, tight and flexible.