45mm crochet edge skip rotary cutter blades made of high quality SKS-7 carbide tools steel that stay sharper and last longer, good prevent rusting and corroding, compatible with most brands 45mm rotary cutter The holes is close together,Ideal for perforating paper towels, ticket stub,card stock and thinner materials and fabrics,Cut paper dotted lines Perfect for Crochet, Quilters, Sewing, Scrapbooking, Card Making, Arts & Crafts, and other DIY Projects! Size: 45 x 8 x 0.3mm/1.8 x 0.3 x 0.01in; Sawtooth Quantity: 35 for per blade; Hardness: 62HRC Package include 10 skip stitch blades per pack. Comes with a storage case.