Both professionals and hobbyists, rejoice! The Excel Blades’ Excel Blades 9mm Snap-Off Precision Blades, 30 Degree Blades – 5 Pack is set to become your next favorite tool! These blades feature 13 segments which can be broken off exposing a new sharp tip, features a 30 degree angle,and is perfect for cutting cardboard, plastics, Coroplast, foam board, gator board and moreThe item # 20030 is made of carbon steel. This products works in conjunction with Excel Blades’ 9mm snap knives: K10, K14, K70, & K73.It comes with 5 per pack.