Irwin WeldTec 1-1/4 in. D X 17 in. L Auger Bit

Introducing the Irwin WeldTec 1-1/4 in. D X 17 in. L Auger Bit — a heavy-duty woodworking solution built to deliver clean, precise holes in thick lumber. This long, purpose-built auger bit is designed for professional-grade results in demanding projects, from cabinetry to furniture construction.

Designed for durability and long service life, this bit is heat treated to stand up to tough drilling tasks without dulling quickly. With a 1-1/4" bore, it creates substantial holes with smooth, clean edges, while the generous 17" overall length lets you reach deep into stock without repositioning or extensive setup.

• Diameter: 1-1/4" bore for substantial holes
• Length: 17" overall for deep drilling in thick stock
• Shank: 7/16" Quick-Change Hex Shank for fast, slip-free bit swaps with compatible drivers
• Heat Treated: Yes — built to withstand heavy use and maintain cutting efficiency
• Brand & Line: Irwin WeldTec, trusted for demanding woodworking tasks
• Package: 1 piece per pack

Why this WeldTec auger bit stands out

Unlike standard round-shank bits, the WeldTec auger bit pairs a robust hex shank with durable heat-treated steel, minimizing wobble and bit slippage when you’re pushing through dense wood. The extended 17" length makes deep-bore projects practical, reducing the need to repeatedly reposition workpieces while still delivering a clean bore.

Ideal use cases

Perfect for carpentry, cabinetry, and furniture making where large, clean holes are required in solid lumber. Use this bit for deep bore access, cable passes, or dowel work in thick stock. Pair it with a drill or impact driver that accepts a hex shank, and maintain proper feed rate to prevent binding in knotty or exceptionally hard wood.

Practical tips for best results

• Secure the workpiece and align the bit precisely to prevent wandering.
• Let the bit cut at its own pace; apply steady pressure without forcing it aggressively.
• Ensure perpendicular alignment to the work surface for a straight, clean hole.

Note: Sale of this product on third-party online marketplaces is prohibited without direct written authorization from Stanley Black & Decker.