Precision ground for fast, smooth, and clean cutting. Spur points ensure accurate positioning and quick penetration. The 4-3/4" length provides better access into hard-to-reach places. Ideal for boring small holes in Wood, Plastic, Plywood, and Formica. Each bit is stamped clearly with sizes for easy identification. ¼ in. Quick-change hex shank. For use with corded, cordless, and impact drills.