Gaosi Tools  Professional DIY Leathercraft Tools 10 in 1 Black High Quality Carbon Steel Changeable Hole Punch. With 10 Tip Sizes 1.0-2.0- 3.0--4.0-5.0-6.0-7.0-8.0-9.0-10.0mm Materials:Durable solid metal construction made by high carbon steel. Niversal setter base with 10 widths::1- 2-3-4-5-6-7-8-9-10mm For punch hole and install snap fasteners, press studs, rivet, grommet, etc It's suitable for home ,DIY craft and so on.Change use easy. You can fully enjoy the manual creation brings much more funny.The tools can let your working easy.