【Package includes】6 pieces 1/4inch adapter, 3/8inch adapter and 1/2inch adapter and each with a set of hex screwdriver socket wrench adapter set. 1/4 inch. 【High Quality Materials】Made of hardened chrome vanadium steel to ensure long life through hard torques without breaking or rusting - Heavy duty construction is compatible with the most powerful firearms. 【Easy to Use】Turns every drill bit into a collet nut Driver Spring-loaded heavy-duty ball bearing holds bushings securely in place Sockets snap in and out won’t slip. 【Special Design】This adapter set is designed to provide a secure lock in addition to your existing tool. Provides extra length to reach a variety of hard to reach spaces. The spring-loaded ball lock ensures a firm fit in the driver’s head to prevent slipping during use. 【Range of applications】Suitable for screwdrivers or power drills has a chuck system 1/4inch quick change or directly into drill chucks. Change your hand tool socket sets into impact/drive sockets. Key