Milwaukee SHOCKWAVE™ Impact Duty™ 3/8" Socket Universal Joint is designed to provide superior access to narrow or hard-to-reach spaces with its 15-degree swivel feature. Crafted from high-strength forged steel, this universal joint extreme impact durability, making it i for high torque applications. The extension is laser etched with its size marking for quick and easy identification on the job site. For added convenience, it features a dual-hole design and ring groove that simplify socket attachment and removal. This socket extension is specifically designed for use with Impact Sockets, allowing for easy attachment and removal of the universal joint. Model Number: 49-66-6724