Goal: This set of adapters 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 ball lock ensures a tight fit in the driver's head to prevent slipping during use. Specifically machined to fit securely in a handheld screwdriver, drill driver or impact wrench.PACKAGE CONTAINS: 3Pcs: 1 or 4inch, 3 or 8inch, 1 or 2inch each with 1 or 4inch hex wrench or driver bits for all quick change drill chuck systems. Turns any electric drill into a conductive power nut Heavy-duty spring-loaded ball bearing holds sockets securely in place. Sockets snap firmly 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: Manufactured from hardened chrome-vanadium (Cr-V) steel to ensure long life Construction to be compatible with the most powerful impact guns.Usage: Sits comfortably and securely in your drill chuck or hand-held driver. Comprised of your most common bit sizes 1 or 4inch, 3 or 8inch, and 1 or 3inch change shank sizes Provides versatility and convenience no matter which tool you have chosen to use. Great for DYI, auto repairs, household maintenance, and most general repairs. A good addition to any tool box set. 1 game