Set of Original Skip-Stitch blades 1, 2,& 3 Perfect for Over Edge Finishing when Sewing, Knitting, Crocheting and many other projects! Fits all 45 mm Rotary Cutters! Perfect for perforating fleece and similar fabrics such as vinyl, felt, and soft foam. The Skip Stitch Original Blade #2 which is designed especially for lighter fabrics such as flannel. The #3 blade can be used with larger crochet hooks and larger yarns.