Crazy Genie 11pcs DIY Leather Craft Tool Die Punch Snap Kit Rivet Setter for Punch Hole and Install Rivet Button Durable solid metal construction Extra long handles, provides better grip and comfort The hole of hollow punch: 2.5mm and 3.0mm Universal setter base with 7 widths: 6mm, 7mm, 8mm, 9mm, 10mm, 12mm, 15mm For punch hole and install snap fasteners, press studs, rivet, grommet, etc.