ICONS GUIDE Micro Grain TOP ARCO Coated Square Type 3F Ultra Micro Grain ARCO Coated Square Type 4F Ultra Micro Grain 0.4μm SICO Coated Square Type 6F Helix Angle Sharp Corner Type Square Type 8F Material Hardness Flatland Type Ball Nose 2F Unequal Chamfer Type Ball Nose 4F Variable Helix Corner Radius Corner Radius 2F UNICO Coated Square Type 2F Corner Radius 4F