Hrph 11pcs Leathercraft Tool Die Punch Snap Rivet Setter Base Kit Set Diy Type 633/655/831/201 Punch: 3mm, 2.5mm Material: fine steel Length: 7.5cm Each type has 2pcs in 1 set(male and female) The diameter of each installation platform is multi-functional base: 6mm-7mm-8mm-9mm-10mm-12mm-15mm