3.5 mm Carbide Endmill 65 HRC 4 Flutes PACK OF 1 MCLNR 2020 These Torx screw are hardened

These Torx screw are hardened up to 50-55 hrc for wear resistance

you should choose a 2 mm  grooving insert

stainless steels and cast irons with long tool lifeISO Range - P/M/K (P05-P20)(M05-M20)(K05-K20)ISO Range - H/S/NGrade or Coating Type PVD+CERMETCoating Layers TiNGrade Colour YELLOW

Balanced dials are used to measure differences relative to a specific surface reference point

Made of steel

3.5 mm Carbide Endmill 65 HRC 4 Flutes PACK OF 1 MCLNR 2020 These Torx screw are hardened3. 5 mm Carbide Endmill 65 HRC 4 Flutes PACK OF 1 Check the 2nd image for dimensions 65HRC carbide endmills are made with a high quality raw material of 0. 005 microns of grain size. Helix Angel of 35 degrees, Suitable material grades to use on STEEL, STAINLESS STEEL, CAST IRON, AND TITANIUM 4 FLUTES, ALCR TIN COATING, tolerance of diameter is below 30 microns