Irwin IR49915 Wood Auger Bit 15/16 in Solid Center Hex Shank

Product Description

The IRWIN IR49915 is a solid center wood auger bit designed for boring clean, accurate holes through dimensional lumber, timbers, and other wood materials. It features a screw point tip that pulls the bit into the wood for consistent feed without additional downward pressure. The 15/16-inch cutting diameter and single spur configuration produce a well-defined hole edge with minimal tear-out. The 5/16-inch hex shank is compatible with standard bit extensions and auger adapters. Carpenters, electricians, and plumbers routinely use auger bits like this one when drilling through framing members for wire runs, pipe penetrations, and structural applications.

This auger bit is suited for residential and light commercial framing, rough-in electrical work, plumbing rough-in, and general carpentry where a 15/16-inch hole is required through solid wood or engineered lumber. The 7-1/2-inch overall length provides reach into framing cavities and between studs without requiring an extension. The 4-1/2-inch twist length gives sufficient chip clearance during the full bore depth.

Key Features

• Solid center construction resists flex and deflection during boring
• Screw point tip self-feeds into wood, reducing operator pressure
• Single spur design scores the perimeter for clean hole edges
• Wide land twist flute clears chips efficiently through the full cut depth
• 5/16-inch hex shank fits standard drill chucks and auger bit adapters
• Packaged individually for single-bit purchase and jobsite use

Compatibility

Designed as an OEM-style replacement and standard-use auger bit compatible with 3/8-inch and 1/2-inch corded or cordless drills equipped with a hex-shank chuck or a standard auger bit adapter accepting a 5/16-inch hex shank.

Installation Notes

A licensed electrician or plumber typically selects auger bits of this type for drilling through wood framing during rough-in. Ensure the drill is set to low speed for auger bits to maintain control and prevent binding. Clear chips frequently on deep passes to prevent overheating and bit wandering. Follow applicable NEC or IPC clearance requirements when drilling near structural members or fasteners.

Technical Specifications

• Cutting Diameter: 15/16 inches
• Overall Length: 7-1/2 inches
• Twist Length: 4-1/2 inches
• Shank Type: Hex
• Shank Size: 5/16 inches
• Tip Type: Screw Point
• Flute Type: Twist
• Spur Configuration: Single Spur
• Center Type: Solid Center
• Series: I-100
• Sold As: Each
• UPC: 024721100160

Standard Information

• Brand: IRWIN
• Manufacturer Part Number: IR49915