Degree Impact Universal Joint-Socket Swivel Knuckle Joint Air Wobble Socket Adapter Extension Electric Wrench 1/2 3/8 1/4 Material: chrome-molybdenum steel Property: Normal Wrench shape: single-end wrench Opposite size: 1/2 (inch) Total length: 44/53/70/97/122 (mm) Surface treatment: phosphating Processing customization: Yes Specifications: 1. Design: This 3-piece impact universal joint kit includes 1/4, 3/8 and 1/2 inch drive universal joints. Specially designed for use with all cordless, electric and pneumatic impact wrenches, the spring-loaded set ball is firmly locked, and the through-hole at the drive end is firmly locked on the drive handle. 2. Durable structure: Impact Universal Joints adopts a unique spherical ball design, which can evenly distribute torque load on a larger surface area, thus improving the range of motion, making it easier to enter the inaccessible area, and significantly improving the strength and life, which is more than the traditional rotating sleeve. Made of high-strength high-quality chrome-molybdenum steel. 3. The traditional universal joint may get stuck, causing the pin to break or fall off. Do not be trapped by the damaged universal socket when taking a break or suspending work. These are very suitable for working on your car; Won't cut your knuckles from narrow places! Package Included: 1*Universal joint