Milwaukee 1/2in Drive 5in Extension features the largest knurling surface, providing superior control during use. The knurling on the female drive end is designed to assist with hand-tightening and is especially useful when working with oily materials. This extension also benefits from chrome plating, which excellent corrosion and rust protection, ensuring durability and long-lasting performance. Backed by a lifetime , this extension is a reliable addition to any mechanic’s toolkit. Model Number: 43-24-9116