Irwin 6-Piece Speedbor Spade Bit Set use Blue-Groove points and cutting edge for faster chip removal that is 4 times faster than standard spade bits. The double cutting spurs scribe the outside of the hole, reducing breakout. 10% larger shank for added durability and grooved hex shank that prevents slipping in drill chuck or bit extension. Fits all standard quick change chucks.
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