Irwin Speedbor MAX Speed Bits 6" Standard Length Bits 15/16" X 6" Brand_Amerivent Designed for single bore doors

Designed for single bore doors with a 2-3/4 in

Includes a 5-1/2" grease pipe and standard-duty coupler

pipe coupling

downspout run-off drains

Irwin Speedbor MAX Speed Bits 6" Standard Length Bits 15/16" X 6" Brand_Amerivent Designed for single bore doorsSpeedbor MAX Speed Bits 6" Standard Length Bits Features: 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.