Irwin 373212BX Bi-metal Hole Saw 2.5 Inch

Product Description

The IRWIN 373212BX is a bi-metal hole saw designed for cutting through a wide range of materials including wood, aluminum, copper, iron, stainless steel, and zinc. At 2.5 inches in diameter, it is a versatile size suited for trade work across multiple disciplines. The bi-metal construction combines a hardened tooth edge with a flexible backing body, allowing the saw to handle both soft and hard materials without premature tooth failure. Licensed tradespeople and experienced DIYers use this saw when a clean, consistent bore is needed through mixed or unknown substrate conditions.

This hole saw is commonly used in plumbing, electrical, and HVAC rough-in work where consistent-diameter holes are required through wall framing, sheet metal enclosures, and light structural members. At 2.5 inches, it covers a common knockout and pipe-pass-through size in residential and light commercial installations. It is sold individually and fits standard arbors compatible with IRWIN Marathon series hole saw bodies.

Key Features

• Bi-metal construction for cutting wood, aluminum, copper, iron, stainless steel, and zinc
• 2.5 inch diameter covers common pipe and conduit pass-through sizes
• Rated operating speed of 135 RPM for controlled, clean cuts
• Flexible steel body resists cracking and warping under load
• Compatible with standard Marathon series arbors

Compatibility

Designed as an OEM-style replacement or direct addition to IRWIN Marathon series hole saw sets. Fits standard hole saw arbors used across residential and light commercial trade applications.

Installation Notes

A licensed electrician, plumber, or HVAC technician typically installs this saw as part of rough-in drilling work. Secure the workpiece before cutting and use the appropriate arbor with a center pilot bit to prevent wandering. Always wear eye protection and ensure the drill is set to the correct RPM range before engaging the saw. Reduce speed when transitioning between soft and hard materials to extend tooth life.

Technical Specifications

• Diameter: 2.5 inches
• Maximum Operating Speed: 135 RPM
• Construction: Bi-Metal
• Compatible Materials: Wood, aluminum, copper, iron, stainless steel, zinc
• Weight: 0.3 pounds
• Unit of Measure: Each

Standard Information

• Brand: IRWIN
• Manufacturer Part Number: 373212BX