Cutting spurs have 3 cutting edges for added durabilityFits all standard 1/4 in quick change chucksFull screw tip allows bit to self feedGrooved hex shank prevents slipping in drill chuck or bit extensionThe Fastest Speedbor everTri-Flute design for faster chip ejection7/16 inch by 6 Inch Tri-Flute 1/4 Inch Drive Speed Bit is a wood boring bit with 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 inch quick-change reduces slipping in standard chucks and is compatible with all 1/4 inch quick-change chucks, including impact drills.