Starrett 65645 Hole Saw 6 in Carbide Tipped Fiberglass Masonry

Product Description

The STARRETT 65645 is a carbide-tipped hole saw designed for cutting large-diameter openings in tough, abrasive materials. With a 6-inch saw diameter and a 1-5/8-inch cutting depth, this saw handles applications where standard bi-metal teeth wear down prematurely. The toothed cutting edge and constant pitch pattern deliver consistent chip removal across a range of substrate densities. It is a non-arbored design, meaning a compatible arbor must be sourced separately. Tradespeople working in construction, renovation, and mechanical installation rely on this size for rough-ins, access panels, and penetrations through walls, ceilings, and floors.

The 65645 is suited for use in residential and commercial jobsite applications involving fiberglass, Formica, masonry brick, MDF, plaster, and suspended flooring materials. It is commonly used by HVAC technicians cutting duct penetrations through composite or masonry assemblies, electricians creating large-diameter conduit or fixture openings, and general contractors working with non-metallic building materials. The 6-inch diameter makes it a practical choice for register boots, access cutouts, and similar trade rough-in work.

Key Features

• 6-inch saw diameter for large-bore cutouts in a single pass
• Carbide-tipped teeth for extended life in abrasive and composite materials
• 1-5/8-inch cutting depth accommodates typical wall and floor assemblies
• Constant pitch pattern for consistent, controlled cutting action
• Toothed cutting edge reduces breakout on brittle substrates
• Non-arbored design allows pairing with a preferred arbor system

Compatibility

Designed for cutting fiberglass, Formica, masonry brick, MDF, plaster, and suspended floor materials. Requires a separately sourced arbor compatible with standard hole saw mandrel systems. Not rated for metal cutting applications.

Installation Notes

Installation and use should be performed by qualified tradespeople familiar with rotary cutting tools and applicable jobsite safety protocols. Secure the workpiece firmly before cutting and confirm the correct arbor is seated and locked before operating the drill. Wear appropriate eye and respiratory protection, particularly when cutting masonry, MDF, or fiberglass, which produce fine particulate. Do not exceed the drill speed recommended for carbide-tipped saws in the material being cut.