The CRB Extra Large Thread Bobbin is built for rod builders who prefer extended wrapping sessions without constant spool changes. Specifically designed to hold 1 oz. rod winding thread spools, this jumbo bobbin keeps larger spools secure while delivering smooth, consistent tension. Perfect for use with Sulky, Fuji, ProWrap, and other 1 oz. spools, the CRB Extra Large Thread Bobbin is a must-have for high-volume wrapping or large decorative projects. Durable construction ensures it will hold up to daily use on any rod building bench. Features & Benefits: Extra capacity – Holds 1 oz. rod winding thread spools. Secure fit – Designed for Sulky, Fuji, ProWrap, and other large spools. Consistent performance – Smooth, even tension for professional wraps. Built for volume – Ideal for extended wrapping sessions or large builds. Durable construction – Long-lasting tool for any rod builder.