Irwin 3041001 1/2" x 6" Speedbor Max Shank (6 Pack)

The IRWIN SPEEDBOR MAX Speed Standard-Length Drill Bit utilizes a tapered, tri-flute design that allows for faster chip ejection and less binding. The drill bits have cutting spurs with 3 cutting edges for added durability and also feature a full screw tip that allows the bit to feed itself. A grooved hex shank helps prevent slipping in the drill chuck or bit extension. The quick-change shank reduces slipping in standard chucks and fits virtually any standard 1/4-inch quick-change chucks.