This stone-setting system includes 18 hardened steel punches and a handle for effectively closing and tightening prongs over stones and bezel setting. Kit contains 18 hardened steel punches: 0.75mm, 1mm, 1.25mm, 1.5mm, 1.75mm, 2mm, 2.25mm, 2.5mm, 2.75mm, 3mm, 3.25mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6.5mm, 7.75mm.