Irwin 88710 IRWIN SPEEDBOR Extra-Long Spade Drill Bit, 5/8-Inch x 16-Inch length (88710)

Speedbor® Blue-Groove™ Extra-Long Woodboring Spade Bit - 5/8" x 16". Blue-Groove point and cutting edge for faster chip removal - 4x faster than standard spade bits. Double cutting spurs scribe the outside of the hole reducing breakout. 10% larger shank for added durability. Grooved hex shank prevents slipping in drill chuck or bit extension. Fits all standard quick change chucks. Not for use with bit extensions or drill presses. Diameter: 5/8". Shank Size: 1/4" Quick-Change. Length: 16".