Crazy Genie Leathercraft 1/2/4/6 Prong 4mm Diamond Chisel Leather Craft Tools Hole Punches Lacing Stitching Perforate Material:Steel 2mm prong , 4mm spacing between the hole (Prong width:Approx 2mm, Prong pitch:Approx 4mm) Package: 1 Prong/ 2 Prong/ 4 Prong/ 6 Prong/ 1+2+4+6 Prong Professional tools for leathercraft