Irwin IRW10504178 Bi-Metal High Speed Holesaw 40mm | 10504178

Irwin IRW10504178 40mm Bi‑Metal HSS Holesaw (10504178) – WELDTEC Tooth Design

The Irwin IRW10504178 holesaw is a 40mm bi‑metal, high-speed steel (HSS) cutting accessory designed for fast, clean hole cutting across a wide range of common site materials. Built for trade users, it combines a durable HSS cutting edge with a bi‑metal body to help withstand shock and wear in regular use.

Model 10504178 is a practical choice for general construction, installation and refurbishment work where consistent cutting performance and chip clearance help keep productivity high.

Key Features

• WELDTEC™ tooth design: Electron beam welded HSS teeth help deliver enhanced durability and longer service life.
• Variable tooth pitch (4/6 TPI): Designed to cut faster with efficient chip removal and reduced torque build-up.
• Variable gullet depths: Helps improve chip clearance for smoother cutting in a range of materials.
• Thick backing plate: Adds stability during cutting for more consistent results.
• Bi‑metal construction: Balanced flexibility and strength to resist shock and wear in demanding applications.

Specifications at a glance

Suitable applications

• General construction and refurbishment hole cutting tasks.
• Electrical installation work where clean, consistent cut-outs are required.
• Plumbing, heating and ventilation installations (material dependent).