4 mm Carbide Endmill 50/75/100 LONG 65 HRC 4 Flutes PACK OF 1 300mm caliper you can use JDMW09 from

you can use  JDMW09 from Mitsubishi Brand Insert into this

hrc upto 45-55 with and without coolantR6 for EMRW6R-CUTTER BODYcoatedSUITABLE TO ALL MILLING CUTTER FOR R6 1204

ER8A Collet Nut has an ID thread of 10mm X

SDMT1205 TF309 Grade is for longer life and better life

EN31 Alloy Selected Steel

4 mm Carbide Endmill 50/75/100 LONG 65 HRC 4 Flutes PACK OF 1 300mm caliper you can use JDMW09 from4 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