Diameter Cutting Description Series Page Range Length 12P1D, 12N1D, .312 .10 - .18 30 Degree, 45 Degree, 60 Degree 12M1D 222 Lead End Mill .250 .22 45 Degree, 60 Degree 15N1E, 15P1E 223 Lead Angle End Mill .588 - .808 .22 45 Degree Lead 15N1E (Top-On Style) 224 Chamfer End Mill 1.375 .95 45 Degree Lead 22N3X 225 Extended Flute Shell Mill 15L1G, 15M1G, .910 - 1.300 .27 - .38 15 Degree, 30 Degree, 45 Degree 15N1F, 15N1G 226 Lead Angle End Mill .750 - 2.00 .18 45 Degree 15N1F_R00 227 Lead Angle End Mill 1.000 .26 45 Degree 15N1H 228 Lead Angle End Mill .875 - 1.00 .69 - .85 30 Degree, 45 Degree 15M1H, 15N1H 229 Lead Angle End Mill .750 - 1.000 15R1V 230 Corner Rounding End Mill 1.000 15R1V (Top-on Style) 231 Corner Rounding End Mill 220