Purpose: This adapter set is designed to provide a locked 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 sockets securely in place. The sockets snap in firmly and do not slip. Colorful: Easy to choose: Different color-coded rings, clear help quickly choose the right one. Our products belong to the latest upgrades, the quality is super good. Material: Chrome vanadium QUALITY: Made from hardened chrome-vanadium (Cr-V) steel to ensure long life. The construction of must 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 have chosen to use. Great for DIY, auto repairs, household maintenance, and most general repairs. A good addition to any toolbox set.