Features 1、HIGH HARDNESS: Forged with high quality HSS, integral heat treatment and molding, bring high hardness, strong and sturdy 2、NOT EASY TO RUST: The surface is finely polished by hand, coated with non rust oil, not easy to rust, and the workmanship is excellent 3、OF SHARPNESS PERFORATION: The knife edge is finely ground, flat with accurate spacing, possess of sharpness perforation and long service life 4、4 DIFFERENT PRONGS: Four different specifications of prongs can meet your different using needs and easy to use 5、FOR LEATHER PUNCHING: Diamond lacing stitching chisel set have good strength and toughness, stable quality, used for leather punching Specification Item Type: Diamond Lacing Stitching Chisel Set Material: High speed steel Purpose: Leather punching Number of Prong: 1 Prong, 2 prong, 4 prong, 6 prong Package List 4 x Diamond Lacing Stitching Chisel