Index A Solid Carbide EndMill Ø Range Num. of Teeth Helix Coating Working Materials Page Appearance Series Code No . Angle A100 Series   up to HRC 20 (for Aluminium alloy) Square Type - 2F ENSFS2, ENSSS2 Ø1~Ø20  A88 Square Type - 3F ENSFS3, ENSSS3 Ø2~Ø20  A89 Square & Long Flute Type - 3F ENSCS3 Ø3~Ø20  A90 Square & High Helix Type - 3F ENSSH3 Ø4~Ø16  A91 High Performance Square Type - 3F ENSSB3 Ø2~Ø20  A92 for side milling High Performance Square Type - 4F ENSSC4 Ø5~Ø12  A93 for slot milling Ball Nose Type - 2F ENBFA2, ENBSA2 0.5R~8R  A94