Crochet Edge Blades Set of 2 Makes Uniform Holes for Crochet Edge Projects by ThreadNanny Makes uniform holes in many materials like fleece and flannel for crochet edge blankets Fits almost any 45 mm rotary cutter OLFA, FISKARS, Clover, Westcott and other Rotary Cutters. Professional Quality Sharp Steel Blade for Quilting, Scrap booking, leather or Vinyl cutting. Comes in its own small plastic box for safe storage.