The 4-1/4" (4.25 inch / 108mm) Bi-Metal Hole Saw is a professional-grade cutting tool designed for fast, clean, and precise holes in a wide range of materials. This heavy-duty hole cutter features bi-metal construction with hardened high-speed steel teeth, delivering exceptional durability and heat resistance for demanding applications. Complete with arbor and pilot bit, this hole saw is ideal for cutting through metal, wood, plastic, drywall, and more. Whether you're a professional electrician, plumber, HVAC technician, or DIY enthusiast, this 4-1/4 inch hole cutter delivers the cutting power you need for conduit pass-throughs, plumbing access, downlight installation, and general construction projects.
4-1/4 Inch (4.25" / 108mm) Diameter for Versatile Applications
The 4-1/4-inch (108mm) diameter is a commonly used size for residential and commercial projects. Perfect for:
Electrical Work: Cutting holes for conduit, electrical boxes, and cable pass-throughs
Plumbing: Creating access holes for pipes, fittings, and drains
HVAC: Cutting openings for ductwork and ventilation grilles
Downlight Installation: Cutting holes for recessed lighting fixtures
Woodworking: Drilling holes for furniture assembly and cabinetry

Heavy Duty Bi-Metal Construction for Superior Durability
Each hole saw is crafted from high-strength bi-metal material—combining hardened high-speed steel (HSS) cutting teeth with a flexible alloy steel body. This construction provides exceptional durability, heat resistance, and wear resistance. The bi-metal design allows the saw to maintain sharpness even when cutting through tough materials like stainless steel, aluminum, and thin metal sheets. The flexible steel body reduces stress on the teeth, preventing breakage and extending tool life.
Smooth Cutting Edge for Clean, Professional Results
The precision-ground teeth with optimized geometry produce smooth, clean cuts with minimal burrs or tear-out. The sharp cutting edges glide through materials effortlessly, leaving a professional finish that requires little to no additional deburring or sanding. This is especially important for visible cuts like downlight openings or door lock installations where appearance matters.
Fast Chip Removal for Efficient Cutting
The optimized tooth design with deep gullets quickly evacuates chips and debris from the cutting path, preventing clogging and overheating. This fast chip removal allows for continuous cutting without frequent stops to clear waste, resulting in faster cutting speeds and extended hole saw life. Less heat buildup also means cleaner cuts with reduced friction.
Complete with Arbor and Pilot Bit for Immediate Use
This hole saw comes complete with a high-quality arbor and pilot drill bit. The arbor features a standard shank that fits most cordless drills, impact drivers, and drill presses. The pilot bit ensures accurate centering and prevents wandering during initial drilling, guaranteeing precise hole placement every time. The quick-change design allows for easy hole saw attachment and removal.
Versatile Applications Across Multiple Materials
This bi-metal hole cutter is ideal for a wide range of materials:
Metal: Stainless steel (up to 1/8"), mild steel, aluminum, brass, copper, thin gauge steel
Wood: Softwood, hardwood, plywood, MDF, particle board
Plastic: PVC pipe, ABS, acrylic, polycarbonate, fiberglass
Drywall: Gypsum board, plasterboard
Laminate: Countertops, flooring, and composite materials

Recommended Usage Tips
For best results and extended tool life:
Use low speed (300-500 RPM) for metal – Apply cutting oil to reduce heat and extend blade life
Use medium to high speed (800-1500 RPM) for wood – Apply steady, even pressure without forcing
Use medium speed (400-700 RPM) for plastic – Avoid excessive speed to prevent melting
For stainless steel – Use cutting oil and slow speed; let the tool do the work
Clear chips periodically – Remove debris from teeth during extended cuts to prevent clogging
Always use the pilot bit – Ensures accurate centering and prevents wandering

What's Included
1 x 4-1/4" (4.25" / 108mm) Bi-Metal Hole Saw
1 x Arbor with pilot bit
Quick-change design for easy attachment

Quality Assurance
Each hole saw is precision-machined and individually inspected to ensure sharpness, concentricity, and consistent performance. Backed by a satisfaction guarantee for worry-free use.
Whether you're a professional electrician, plumber, contractor, or DIY enthusiast, this 4-1/4" Bi-Metal Hole Saw with Arbor provides the cutting power, precision, and durability you need for clean, fast holes in any project. Add it to your toolkit today and experience the difference of heavy-duty bi-metal performance.