Tri-flute design for faster chip ejection. Three cutting spurs for faster, cleaner holes, less breakout, and extended drilling life. Full screw tip allows bit to self feed. Grooved hex shank prevents slipping in drill chuck or bit extension. Fits all standard 1/4" quick change chucks. Diameter: 1-1/4" Length: 6" Flute length: 2-7/8" Shank Size: 1/4" Speedbor max drill bit Standard length Tri-flute design for faster chip ejection Three cutting spurs for faster, cleaner holes, less breakout, and extended drilling life. Full screw tip allows bit to self feed Grooved hex shank prevents slipping in drill chuck or bit extension Fits all standard 1/4" quick change chucks.