Freud Precision Shear Serrated Edge Forstner Drill Bit 5/8-Inch by 5/16-Inch Shank (PB-004) Razor sharp serrated edge for fast and flawless cutting Quality Forged Construction for extended life Ultra Sharp Spur to ensure an accurate starting hole Steep Angled Cutting Edges  produce holes that are smooth and flat, and create chisel-like" curls for fast, clean chip removal.