IRWIN WeldTec Auger Wood Drill Bit 1-1/4 in X 17 in - Long Reach

In this review the IRWIN WeldTec Auger Wood Drill Bit 1-1/4 in X 17 in is evaluated for carpenters, deck builders and DIYers who need a long, durable auger that bores through wood quickly and reliably. The single biggest reason to buy is its ability to cut through wood and encounter embedded nails without damaging the bit, thanks to its single cutter, side lip and robust heat treatment. For anyone drilling deep posts, beams or heavy timbers, this bit pairs speed with strength for demanding wood boring tasks.

Key Features

• 1-1/4 in Diameter: Provides a large, consistent hole for lag bolts and through fasteners used in structural timber work.
• #2 Hex Shank: Fits common power drill chucks and quick-change adapters to keep the bit secure during heavy use.
• 17 in Overall Length: Long reach lets users bore deep holes through posts and stacked timbers without repositioning the workpiece.
• Full-length Heat Treatment: Strengthens the twist where strain is greatest and guards against bending in heavy duty applications.
• Hollow Center Flutes: Clear chips quickly from deep holes so drilling stays fast and the cut remains clean.
• Single Cutter and Side Lip: Helps the bit cut through nails and metal obstructions without immediate damage to the cutting edge.

Who It's For

The bit is aimed at professional carpenters, deck and fence builders and serious DIYers who regularly bore large holes in dimensional lumber, pressure treated posts and heavy timbers. Its length and hardened construction suit jobs where speed and durability matter, such as installing through-bolts or sinking structural holes in situ.

Less suitable users include those who only need occasional small holes or delicate finish work, since the large diameter and aggressive screw point are overkill for trim carpentry and fine cabinetry. If you need a variety of diameters for light hobby tasks, a smaller set may be more economical.

Pros & Cons

Pros

• Excellent cutting speed and accuracy for large holes, praised for drilling through 6x6 treated timbers without bogging.
• Durable construction and full-length heat treatment reduce bending and extend service life under heavy use.
• Hollow flutes and wide lands keep the bit clearing chips and running straight in deep bores.

Cons

• At 17 in length and 1-1/4 in diameter, it is bulky and not practical for light or fine woodworking tasks.
• Made in China; some users may prefer locally manufactured bits for high-volume professional shops.

Specifications

Our Verdict

The IRWIN WeldTec 1-1/4 in X 17 in auger is a practical choice for tradespeople who need a long, robust bit that bores large holes quickly and handles occasional nails without damage. Its heat-treated body and efficient chip clearance deliver strong value for structural and outdoor woodwork, though it is oversized for light finishing tasks.

Frequently Asked Questions

Can this bit cut through nails?
Yes, the single cutter and side lip are designed to cut through nails and metal obstructions without immediately damaging the bit.

Will it fit a standard cordless drill?
The bit uses a #2 hex shank which fits most power drills with hex chucks or quick-change adapters.

Can the bit be re-sharpened?
Yes, the bit can be re-sharpened to extend service life after wear.