- 1/4” x 6”- Blue-Groove™™ point and cutting edge for fast chip removal- Aggressive cutting edges for long life and speed- Chamfered corners for hole quality and durabilityIrwin Speedbor 1/4 in. X 6 in. L Carbon Steel Wood Boring Bit Hex Shank (88804)SKU: 024721200426 A20$3.00PriceQuantity*Add to Cart