MING R/L 04/07 : MING: Mini carbide boring bars for grooving and turning in Dmin = 2.0 - 6.8 mm
  DesignationdW+0.05/0fabl1l2Tmax-rDminR/LGICATGIREMgiicGrade
  MINGR04-050050D020 4.000.500.201.801.221.06.00.402.00R6861060 1TT9030 
  MINGR04-100050D020 4.000.500.201.801.226.011.00.402.00R6861017 1TT9030 
  MINGR04-050070D030 4.000.700.702.701.921.06.00.603.00R6861016 1TT9030 
  MINGR04-100070D030 4.000.700.702.701.926.011.00.603.00R6861018 1TT9030 
  MINGR04-090100D040 4.001.001.503.502.325.510.50.804.00R6861012 1TT9030 
  MINGR04-150100D040 4.001.001.503.502.331.516.50.804.00R6861078 1TT9030 

The corner radius is less than 0.1mm