The FUSION advanced performance carbide end mills fuse advanced high performance technology with classic general purpose affordability. The variable helix design with offset flute spacing supports the best in harmonics and chip evacuation. The corner radius design, for added edge strength and wear protection with dual edge preparation, edge honing and post-coating polish, make for an outstanding performer in steels, stainless steels, hardened materials, cast iron and high temp superalloys. Made from premium C-2 grade, sub-micron grain carbide with 10% cobalt content. Available with sharp corners for perfect 90? shoulders or with various corner radii. Choose AlTiCrN coated tools for superior lubricity and extended tool life. Made in the USA. GWS/Monster Tool Part #284-000149