• CORNER RADIUS - 4 FLUTE - STUB LENGTH, ALTiN+H Coating - INCH• Effective 2018 merged into XXR504A Series because of duplication in offering• Variable helix tools, cutting diameters• High precision with excellent surface finish due to each 4F variable helix geometry• Corner radius to reduce corner chipping• Unique patented design decreases chatter and resonance• Unique patented design decreases chatter and resonance• Strong cutting edge design• Excellent performance on mild mold steels & stainless steelsReplacement: XXR504A032030