Both professionals and hobbyists, rejoice! The Excel Blades’ Excel Blades 9mm Snap-Off Knife 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 45 degree angle,and is used to make pull cuts to open boxes, trim dried caulk or paint, and slice through soft materials.The item # 20003 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.