Compatible with lathes, drilling machines, boring machines, fixtures, drills, and milling cutters. It perfectly fits chucks that accept tools with various straight shanks. Made from high carbon steel, providing high strength, high hardness, and a firm structure for reliable performance. The surface is smooth with no scratches, delivering stable and dependable operation. Used as a motor extension rod and with replaceable drill chucks, it perfectly fits chucks of various straight-shank tools. Key benefits - Robust construction for durable use and long service life - Reliable compatibility with multiple machine types and straight-shank tools - Smooth surface minimizes wear and ensures stable performance during operation - Easy to pair with motor extension setups and replaceable drill chucks Use scenarios - In a lathe or milling setup, attach as a motor extension rod to drive tools via replaceable chucks that accept straight shanks - On a drill press or drilling workflow, swap in replaceable drill chucks to accommodate different straight-shank bits quickly and securely - During milling or drilling tasks requiring consistent alignment, rely on the smooth, hard-wearing surface to maintain stable performance and reduce tool chatter