Irwin Blue Groove 7/8 Inch Spade Bit — RFB78

The Irwin RFB78 Blue Groove Spade Bit is engineered for fast, clean hole boring in wood. The tri-cut spur tip scores the wood ahead of the cutting edge for cleaner entry holes with less tearout, while the aggressive geometry keeps the bit boring efficiently through studs and joists. At 7/8 inch diameter, this bit is well-suited for anchor bolt clearance holes, pipe sleeves, and larger conduit pass-throughs in framing lumber.

• Brand: Irwin
• Part Number / SKU: RFB78
• Diameter: 7/8 Inch
• Shank: 1/4 Inch Hex
• Application: Wood boring in studs, joists, and general framing

Available Variants:

• (1) Bit
• 12 Pack

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