Irwin 4-5/8 Inch x 5 Inch Self Feed Bit — RSF458

The Irwin RSF458 Self Feed Bit is engineered for large-diameter hole cutting in wood under heavy-duty drilling conditions. Forged from high carbon steel in a one-piece design with an aggressive screw pitch for strong, consistent feed performance. The 7/16 inch quick-change hex shank fits 1/2 inch or larger drills. Ideal for plumbers, electricians, and contractors boring large holes for pipe, conduit, and mechanical installations in dry, wet, or treated lumber.

• Brand: Irwin
• Part Number / SKU: RSF458
• Diameter: 4-5/8 Inch
• Overall Length: 5 Inch
• Shank: 7/16 Inch Hex (Quick Change, fits 1/2" or larger drills)
• Material: Forged High Carbon Steel (One-Piece Design)
• Screw Point: Replaceable, Coarse Thread
• Application: Large-diameter wood boring for pipe, conduit, and mechanical installations

Available Variants:

• (1) Bit
• 12 Pack

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