Long heavy blades are designed for large flies and tough materials. If you work with hair or other heavy materials, this is a true workhorse. Excellent for natural materials and can handle most synthetics. Based on the Big Three, this series has T.C. blades welded onto the scissor blade frame. T.C. is 7x harder than stainless steel and holds an edge longer. These can handle all types of tying materials, but were created to tackle modern synthetic materials.