Precision Quilting Tools manufactures the highest quality products used for Quilting, Sewing, and Arts & Crafts. All of our blades are made of SKS-7 Carbide Tool Steel so the blades will stay sharper and last longer. Fits all 60mm Rotary Cutters. Works great on fleece and flannel! Perfect for Quilters, Sewing, Scrapbooking, Card Making, and other DIY Projects!