OUTSIDE SNAP GAUGE Code Range Arm length Tip length x diameter 421-020-11 0-20mm 60mm 6x3mm 421-040-11 20-40mm 60mm 6x3mm 421-060-11 40-60mm 55mm 6x3mm 421-080-11 60-80mm 55mm 6x3mm 421-100-11 80-100mm 55mm 6x3mm Graduation: 0.01mm Pin tips