Irwin Speedbor MAX Speed Bits 6" Standard Length Bits 11/16" X 6" Masonry Drill Bits Parabolic flute design for improved

Parabolic flute design for improved heat dissipation and increased life

All bits have a 4-1/2" twist length and a 7-1/2" overall length

Variable speed of 0 – 2800 SPM

3/8" mnpt x 3/8"

Irwin Speedbor MAX Speed Bits 6" Standard Length Bits 11/16" X 6" Masonry Drill Bits Parabolic flute design for improvedSpeedbor 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.