日本三豐半徑規每一量塊上均標有半徑尺寸。配有成對凹凸規。帶鎖緊裝置。每一量塊上均標有半徑尺寸。配有成對凹凸規。帶鎖緊裝置。毫米測量范圍貨號組合備注0.4-6mm(18對)186-1100.4,0.8,1.2,1.5,1.6mm,1.75-3mm間隔0.25mm,3.5-6mm間隔0.5mm90 arc0.5-13mm(26對)186-9020.5-13mm間隔0.5mm90 arc1-7mm(34對)186-1051-3mm間隔0.25mm,3.5-7mm間隔0.5mm180 arc7.5-15mm(32對)186-1067.5-15mm間隔0.5mm180 arc15.5-25mm(30對)186-10715.5-20mm間隔0.5mm,21-25mm間隔1mm180 arc英寸測量范圍貨號組合備注1/32 -17/64 (16對)186-1031/32 -17/64 間隔64ths90 arc1/32 -17/64 (16對)186-1011/32 -1/4 間隔64ths180 arc1/32 -17/64 (16對)186-10217/64 -1/2 間隔64ths180 arc1/32 -17/64 (16對)186-1049/32 -33/64 間隔64ths90 arc1/32 -17/64 (16對)186-9011/64 -17/64 間隔64ths,9/32 -1/2 間隔32nds---