IRWIN SPEEDBOR Tri Flute Wood Drill Bit 9/16"(3041014) Product Description Speedbor Max is the fastest Speedbor. Tri flute design for faster chip ejection. There are 3 cutting edges for added durability and the full screw tip allows the bit to self feed for easier pull through. 1/4'' quick change hex shank prevents slipping in drill chucks and bit extensions. Fits all standard quick change chucks and adapters. From the Manufacturer The Irwin Tools 3041014- 9/16" X 6" SPEEDBOR MAX Drill Bit is the Fastest Speedbor spade bit ever. Tri-Flute design for faster chip ejection. Cutting spurs have 3 cutting edges for added durability. 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. Features The Fastest Speedbor spade bit ever Tri-Flute design for faster chip ejection Cutting spurs have 3 cutting edges for added durability Full screw tip allows bit to self feed Grooved hex shank prevents slipping in drill chuck or bit extension USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.