The Avalanche carbide end mills are specifically designed for maximum productivity in aluminum and non-ferrous materials. They provide excellent work piece finishes with extremely high feed rates. Made from premium C-2 grade, sub-micron grain carbide with 10% cobalt content, they have a 42? helix, right hand spiral and are right hand cut, center-cutting. The ground cylindrical land aids in constant workpiece engagement and world-class finishes with special end geometry for smooth floor finishes. Available with sharp corners for perfect 90? shoulders, various corner radii for edge strength and added wear protection, or with virtually perfect ball nose radius end. Choose optional ZRN coating for ultimate lubricity or extended neck relief to prevent wall interference in deep pockets. Made in the USA. GWS/Monster Tool Part #283-501255D