9/16" SPEEDBOR WOOD BORING BIT

The Irwin Speedbor wood drilling bit is the fastest Speedbor ever. The Speed Tip features a full screw-point that allows bit to self-feed, as well as three (3) cutting spurs for faster, cleaner holes, less breakout, and extended drilling life. The tapered tri-flute design allows forfaster chip ejection and less binding. Its grooved hex shank prevents slipping and fits all standard 1/4 ...