Fly Tying Bobbin - Great for Tying all Types of Flies - Essential Fly Tying Tool - Ceramic Insert For Smooth Fly Tying - Bobbin For Tying Flies of All Sizes and Styles. Great for Tying All Flies Ceramic Inserts in Bobbin Tube For Ease of Use Smooth Rolling Thread Holders Great for All Types of Fly Tying Perfect Bobbin to Use For All Fly Types Made from Brass and Steel