Irwin 49918 Dual Auger Wood Bit 1-1/8 Inches

Product Description

The IRWIN INDUSTRIAL TOOL CO 49918 is a 1-1/8 inch dual auger wood bit designed for boring clean, accurate holes through dimensional lumber, timbers, and engineered wood products. The dual auger geometry pulls the bit into the material while shearing wood fibers ahead of the main cutting edges, reducing tear-out and drill motor strain. This bit is a standard tool for electricians, plumbers, HVAC installers, and general contractors who need to run pipe, conduit, or duct penetrations through wood framing. Each package contains 12 bits.

This bit is suited for residential and light commercial framing applications where consistent hole diameter and clean entry and exit are required. Typical uses include boring through wall studs, floor joists, and roof rafters during rough-in work for mechanical, electrical, and plumbing trades. The 1-1/8 inch diameter accommodates common pipe and conduit sizes used in these installations.

Key Features

• 1-1/8 inch cutting diameter for pipe and conduit rough-in work
• Dual auger design pulls bit forward and reduces operator push force
• Shear cutting geometry minimizes tear-out on entry and exit faces
• Sold in a package of 12 bits for crew and fleet stocking

Compatibility

Designed as an OEM-style replacement auger wood bit compatible with standard 3/8 inch and 1/2 inch keyed or keyless drill chucks used in corded and cordless drill drivers common to the trades.

Installation Notes

Installation of this bit requires a corded or cordless drill with adequate torque for the material being bored. Always ensure the workpiece is secured before drilling. Follow applicable codes such as the NEC or IPC when sizing penetrations for conduit or pipe runs through structural members. Wear appropriate eye protection when boring overhead or through layered materials.