Irwin IR49924 Power Auger Bit 1.5 in Screw Point Hex Shank

Product Description

The IRWIN IR49924 is a solid-center power auger bit designed for fast, clean boring through wood framing, dimensional lumber, and engineered wood products. Featuring a screw point tip that draws the bit into the material, it reduces operator push force and helps maintain straight holes. The 7/16-inch hex shank seats securely in standard power drill chucks and auger extensions. With a 1.5-inch cutting diameter and a 4.5-inch twist length, this bit handles through-hole applications common in rough framing, plumbing rough-in, and electrical cable runs. The wide land and single-spur geometry help clear chips efficiently and extend cutting life in repetitive production drilling tasks.

This bit is suited for residential and light commercial construction applications where 1.5-inch bored holes are required in wood substrates. Typical users include electricians drilling stud bays for conduit or cable, plumbers boring through framing for drain or supply runs, and framing crews working with dimensional lumber. The solid-center construction resists flex under load, making it appropriate for use with heavy-duty right-angle drills and standard corded or cordless drill drivers capable of accepting a 7/16-inch hex shank.

Key Features

• 1.5-inch cutting diameter for standard rough-in bore sizes
• Screw point tip self-feeds into wood, reducing operator effort
• Solid-center construction resists deflection under load
• 7/16-inch hex shank compatible with standard drill chucks and auger extensions
• Single spur and wide land geometry for efficient chip ejection
• Twist flute design clears debris along the 4.5-inch twist length

Compatibility

Designed as an OEM-style replacement and standard fit for power drills and right-angle drills accepting a 7/16-inch hex shank; suitable for boring through softwood and hardwood framing members in residential and light commercial construction.

Installation Notes

Installation of this bit should be performed by a qualified electrician, plumber, or carpenter familiar with power tool safety. Ensure the drill is powered off and the chuck is fully secured around the hex shank before operation. Eye protection and appropriate PPE are required when drilling. Follow applicable building codes, including NEC and IPC provisions, regarding hole placement, sizing, and protection of bored members.

Technical Specifications

• Cutting Diameter: 1.5 inches
• Overall Length: 7.5 inches
• Twist Length: 4.5 inches
• Shank Type: Hex
• Shank Size: 0.4375 inches (7/16 inch)
• Tip Type: Screw Point
• Construction: Solid Center
• Flute Type: Twist
• Spur Configuration: Single Spur
• Land Type: Wide Land
• Sold As: Each
• UPC: 024721499240

Standard Information

• Brand: IRWIN
• Manufacturer Part Number: IR49924