Irwin Industrial Tool Co 49905 Solid Center Auger Bit 5/16 in

Product Description

The IRWIN INDUSTRIAL TOOL CO 49905 is a 5/16-inch solid center auger bit engineered for boring clean, accurate holes in wood. The solid center construction provides extra rigidity during the cut, reducing deflection in demanding applications. At 7-1/2 inches overall length with a 4-1/2-inch twist length, it suits typical hand brace and electric drill setups used by carpenters, electricians, and plumbers routing through framing and structural lumber. The full-length heat-treated steel resists bending under heavy-duty load and strengthens the twist at the point of greatest strain. This is a pack of 6 bits, pouched for jobsite storage.

This bit is suited for residential and light commercial framing, rough-in drilling, and finish carpentry where a clean hole circumference matters. The coarse screw point pulls the bit forward in both hard and soft wood species without excessive feed pressure. Wide lands keep the bit tracking straight as it advances through the bore, and the ground flutes channel chips inward and away from the outside diameter for a faster, cleaner cut. Installers drilling through dimensional lumber, joists, or studs will find this bit well matched to the work.

Key Features

• Solid center design provides extra rigidity and reduces bit flex during boring
• Full-length heat treatment guards against bending in heavy-duty applications and strengthens the twist at peak strain points
• Wide lands keep the bit aligned straight throughout the bore
• Ground flutes funnel chips to the inside of the bit and away from the outside diameter for a faster, cleaner cut
• Single spur cutting edge scribes the hole circumference for a smoother finish
• Coarse screw point enables fast boring in both hard and soft wood
• Comes pouched in a pack of 6

Compatibility

Designed as a standard solid center auger bit for use with hand braces and electric drills that accept auger-style shanks, suitable for boring through hard and soft wood species.

Installation Notes

Auger bits are installed by carpenters, electricians, and plumbers for rough-in and framing applications. Ensure the bit shank is fully seated and secured in the chuck or brace before starting the bore. Keep steady, consistent feed pressure and allow the screw point to self-feed rather than forcing the bit. Inspect the bit for damage before each use, and do not use a damaged or bent bit.