DIY Set of 11 Craft Tool Die Punch Snap Rivet Setter Base Kit with Base for Punch Hole and Install Rivet Button Durable solid metal construction These hand tools used for the metal popper only , not for the plastic popper 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.