英制／公制型             數顯型 

 測量范圍            貨號            精度            備注 
                 573-642-20                  刀刃型，可測量最小孔徑： 
 .4 " - 8"                     ±.002"                              o.4 " 
                 573-645-20                  內凹槽型，可測量最小孔徑： 
 .4 " - 6"                     ±.002"                                o.4 " 
                 573-646-20                  尖爪型，可測量最小孔徑： 
 .8" - 6"                      ±.0015"                             o.8" 

  公制型                                                            &nbs