[Purpose]: This adapter set is designed to provide a lock-on extension to your existing tool. Provides extra length to reach a multitude of hard-to-reach spaces. The spring-loaded ball lock ensures a tight fit in the driver head to prevent slipping during use. Specifically machined to securely fit a handheld screwdriver, drill driver, or impact wrench.[PACKAGE CONTAINS]: 3Pcs: 1/4", 3/8", 1/2" each with a 1/4" hex key / driver bits for all quick-change drill chuck systems. Turns any power drill into a power nut driver. The heavy-duty spring-loaded ball bearing holds the sockets securely in place. Sockets snap firmly into place and won't slip.[Colorful]: Easy to choose: Different color-coded rings, clear help quickly choose the right one. Our products belong to the latest updates, the quality is super good. [Material]: Chrome Vanadium QUALITY: Made from hardened chrome-vanadium (Cr-V) steel to ensure a long service life. The construction of duty to be compatible with the most powerful impact guns. [Usage]: Fits comfortably and securely in your drill chuck or handheld driver. Consisting of your most common bit sizes 1/4", 3/8", and 1/3" change shank sizes. Provides versatility and convenience regardless of the tool you chose to use. Great for DIY, automotive repairs, household maintenance, and most general repairs. A good addition to any toolbox set.