Tandy Leather 88045-02 Craftool Pro Line Diamond Stitching Chisel 2 Prong | 1/8" (3mm) Spacing1 8" spacing between holes. Made from 41xx steel, these chisels have incredible strength and toughness due to the case hardening process after the chisels are formed. Beautifully finished with a black electrophoresis coating to prevent surface corrosion and provide wear resistance. Used with our Professional Cutting Board #3465 00, these elite chisels will perform like a charm and provide you years of use.