*Made of stainless steel hardened *With data output *4-way measurement:outside,inside,depth,step *Resolution:0.01mm/0.0005"*Accuracy:± 0.03mm(0-200mm),± 0.04mm(200-300mm) .*4-way measurement:outside,inside,depth,step.*Buttons:zero setting,metric/inch conversion,power on/off,ABS buttons.*Metal cover Range Model0-4"/0-100mm CES-40-6"/0-150mm CES-60-8"/0-200mm CES-80-12"/0-300mm CES-12