Features: This iron bobbin winder features an efficient winding design for durability and stable performances, ensuring longevity and solving wear issues in frequent industrial sewing machine accessory use, ideal for demanding environments. With easy installation for quick setup and precise winding control to minimize thread waste, this sewing machine accessory offer convenience and accuracy in every operate. Designed for industrial sewing machine operators and professional in garment manufacturing, it caters to users needing reliability accessories for extended work . Perfect for factory settings and garment workshops where frequent bobbin winder changes and quality production are essential, enhancing overall efficiency. Wide compatibility for various computer flatbed sewing machines provides versatile use across multiple sewing tasks, making it for diverse applications. Specifications: Component: iron Top Diameter: Approx.52mm /2in,54mm/2.13inch;(Optional) Base Diameter: Approx. 4cm / 1.57in Features: Wear-resistant and rust-resistant, not easily deformed after long-term use,High-strength iron to ensures stable winding performances Package Includes: 1pc Bobbin Winder note: Please allow 1-3cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.