MINF R 07-D150 : MINF: Mini carbide boring bars for deep face grooving of Dmin = 15 mm
  DesignationdW+0.05/0al1l2Tmax-rDminR/LGICATGIREMgiicGrade
  MINFR07 200250D150 7.002.505.9036.0021.020.0015.00R 6861075 1TT9030 
  MINFR07 200300D150 7.003.005.9036.0021.020.0015.00R 6861032 1TT9030 
  MINFR07 300300D150 7.003.005.9046.0031.030.0015.00R 6861076 1TT9030 

The corner radius is less than 0.1mm