Kyoshin Elle Leathercraft Punching Tool 1x3mm Lacing Thonging Chisel Single Prong Leather Hole Punch, to Pierce Lace Slits in Leatherworking | Goods Japan
Diamond Stitching Chisel 4mm 4 Prong - Leathersmith Designs Inc.
Owden 3pcs 3 Mm Leather Diamond Chisels Kit 1/2/4 Prong Available Pre Punching For Leather Stitches Diamond Punch Set - Punching - AliExpress
Amazon.com : Pingle New Model with 3mm 1/2/4/6 Prong DIY Diamond Lacing Stitching Chisel Set Leather Craft Kits,Has Been Polished, More Sharp and Durable : Arts, Crafts & Sewing