Ingersoll Cutting Tools' 3n1-Rounds series 45D...RP solid-carbide roughing endmills feature not only high-feed geometry but variable pitch and chip splitters, as well. This series covers a range of applications including slotting, pocketing, helical interpolation and contouring. Four- and 5-flute versions are available with a 38-degree helix and large corner radii to enable high-feed milling. The serrated cutting edge features flat peaks, which leave a fine surface finish. Diameters range from 0.250" to 0.750" and are supplied in all-purpose grade IN2005.