Irwin IRW10504166 Bi-Metal High Speed Holesaw 21mm | 10504166

Irwin IRW10504166 Bi-Metal High Speed Holesaw, 21mm Diameter (10504166)

Irwin IRW10504166 is a bi-metal holesaw designed to cut clean, accurate 21mm holes in a wide range of common site materials, making it a practical choice for tradespeople and installers who need consistent results with a drill-driven holesaw setup.

With a variable tooth pitch and a durable bi-metal construction, model 10504166 is well suited to general construction and fit-out work where you may be moving between materials and need a holesaw that’s built for regular use.

Key Features

• Bi-metal construction: High-speed steel cutting edge with a steel body for durability and wear resistance in demanding use.
• Electron beam welded teeth: Helps strengthen the tooth-to-body bond for longer service life.
• Variable tooth pitch (4–6 TPI): Promotes quicker cutting and smoother operation across a variety of materials.
• Thick backing plate: Adds rigidity for controlled cutting and improved robustness under load.
• WeldTec™ technology: Designed to enhance durability and support higher cutting speed for professional applications.

Specifications at a glance

Suitable applications

• General construction and refurbishment tasks where a 21mm hole is required.
• Electrical installation, plumbing, heating and ventilation work.
• Cutting a range of materials including aluminium, copper, iron, stainless steel, wood and zinc.