Objective: 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 securely fit a handheld screwdriver, drill driver or impact wrench. PACKAGE CONTAINS: 3Pcs: 1/4", 3/8", 1/2" each with 1/4" hex wrench/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 The 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 1/4", 3/8", and 1/3" 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. Size: 1/4*1/4*65mm length - 1/4" shank can be converted to 6.35mm square head Length 3/8*1/4*65mm - 1/4" shank can be converted to 9mm square head 1/2*1/4*72mm length - 1/4" shank can be converted to 13mm square head Package included: 1 x (socket 1/4" Hex to 1/4" Socket 1 x (1/4" Hex to 3/8" Socket) 1 x (1/4" hex socket to 1/2" socket)