Irwin 3041002 Speedbor® MAX™ Tri-Flute Standard Length Drill Bit - 5/8" X 6"

Three cutting spurs for faster, cleaner holes, less breakout, and extended drilling life. Full screw-point tip allows bit to self-feed for ease of drilling. Tapered tri-flute design for faster chip ejection and less binding. 1/4" quick-change shank reduces slipping in standard chucks and is compatible with all 1/4" quick-change chucks, including impact drills. Diameter: 5/8". Shank Size: 1/4" Quick-Change. Length: 6".