Wrenches features: This adapter set is designed to provide a securely locked in extension to your existing tool. Provides additional length to reach into a multitude of hard to reach spaces. The spring ball lock ensures a tight fit into the driver head to prevent slipping during use. Features Color: Black Size: 5.80X1.50X1.50cm/2.28X0.59X0.59 inch Material: Chrome-vanadium steel It is made from premium chrome-vanadium steel, which greatly improves the strength and abrasion resistance of the workpiece The extra electroplating process provides products with higher rust-resistance and better gloss Hex shaft fits all quick-change adapters, extensions and drill chuck This tool is light weight and small size which mean it saves space. No need to carry bunches of sockets The chamfered edges and spring-loaded detent ball will ensure a tight and secure fit, thus allowing you to save your precious time and perform auto repair tasks easily.