1. Carbon Steel Material: Forged with carbon steel for toughness and wear resistance. frequency hardened and black oxide treated for hardness and durability. 2. NonSlip GripThe handle is coated with red rubber, providing a comfortable grip and force transmission. The ergonomically designed handle ensures a pleasant feel during use. 3. Versatile Use: Designed for driving keyhead screws, threaded rings, and shafts. The precise fit reduces the risk of damage to shafts, nuts, and housings. Suitable for ER lathe collet nuts, CNC milling chuck nuts, and most tool holders, including spring collet CNC tool holders. 4. Quality MaterialMade from grade carbon steel, this precision wrench guarantees durability and reliability. It is designed for professionals and hobbyists who demand easy operation and quality work results.