The Ashford Bobbin Winder - Wooden has a tapered stainless steel shaft (diameter tapers from 1/8 to 3/16 inches). Nylon bearings. Ratios 12:1. Includes: Clamp and 1 boat shuttle bobbin. Unfinished Silver Beech hardwood. The Ashford Wooden Bobbin Winder is perfect for winding yarn onto bobbins for the Ashford boat shuttle. Tapered stainless steel shaft. Shaft tapers from a diameter of 1/8 to 3/16 inches. Nylon bearings. Fast 12:1 ratio. Includes clamp and 1 boat shuttle bobbin. Made from unfinished Silver Beech hardwood.