... Resolution: 0.001mm Model: ET-300HR, ET-400HR, ET-600HR Compare with mechanical type tool presetter, optical tool presetter can see tools profile ... radius and angle directly from screen ModelET-300HRET-400HR ET-600HR Measuring Length for Spindle300mm400mm600mmMeasuring Length for Diameter300mm300mm400mmMeasuring ... /BT50, HSK100/BT50FunctionMeasure Tools' Radius, Length, Tool tip angle, Tool tip arc