Application Material: Cast Iron, Carbon Steels, Alloy Steels, Hardened Steels, Prehardened Steels and Tool Steels. Flutes: 4 Coating: ALTiN / TiALN Helix Angle: 45¢X Dia FL Flutes Shank O.A.L 3 8 4 4 50 3.5 9 4 4 50 4 10 4 4 50 4.5 11 4 6 50 5 13 4 6 50 5.5 14 4 6 50 6 15 4 6 50 6.5 16 4 8 60 7 17 4 8 60 8 20 4 8 60 8.5 21 4 10 75 9 22 4 10 75 9.5 24 4 10 75 10 25 4 10 75 11 28 4 12 75 12 30 4 12 75 14 35 4 16 100 16 40 4 16 100 20 45 4 20 100. plastic box.