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The WILLIAMS COMFORT PRODUCTS 3830-89-VIP is a bimetal holesaw sold in an industrial pack configuration, sized at 3.5 inches in diameter. Bimetal construction combines a high-speed steel cutting edge with a flexible alloy steel body, delivering durability across repeated cuts in sheet metal, wood, plastic, and composite materials. This type of holesaw is a standard tool for trade professionals who need consistent, clean holes during HVAC rough-in, electrical box installation, plumbing penetrations, and similar tasks requiring precise circular cutouts.
The 3830-89-VIP fits common applications where a 3.5-inch diameter hole is required. Typical use cases include cutting through wall panels, ductwork flanges, subflooring, and junction box openings. The industrial pack format is suited for shops, service fleets, or job sites that need a ready-to-install unit without additional packaging steps. HVAC installers, electricians, and plumbers regularly rely on bimetal holesaws of this size for standard rough-in work.
Designed as an OEM-style replacement or standard holesaw for use with compatible drill arbors accepting bimetal holesaws in the 3.5-inch diameter range.
Bimetal holesaws are installed by licensed HVAC technicians, electricians, and plumbers using a compatible arbor mounted to a corded or cordless drill. Before cutting, confirm the substrate is free of hidden wiring, gas lines, and water lines. Use appropriate cutting speeds for the material being penetrated, and wear eye and hand protection throughout the operation. Follow all applicable local codes governing penetrations through fire-rated assemblies or structural members.
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