Features
- Patented tooth geometry to improve chip removal and cutting efficiency
- Large continuous slot for easier plug ejection
- High-speed steel cutting edge suitable for wood, metal, and plastic
- Deeper saw design to cut 2-by dimensional lumber in one pass
- Bi-metal construction
Specifications
| Application | Multipurpose |
| Bit Type | Hole Saw |
| Blade Material | Bi-Metal |
| Contents | 1 hole saw |
| Drilling Depth | 1.75 in (1-3/4 in / 44 mm) |
| Hole Diameter | 4-1/4 in (108 mm) |
| Minimum Chuck Size | 1/4 in |
| Pilot Drill Diameter | 0.25 in |
| Case Included | No |
| Made In | USA (with global materials) |
| Has Plug Eject | Yes |
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Bi-metal holesaw made in the USA with global materials. Patented tooth geometry improves chip removal for more efficient cutting in wood, metal, and plastic. A large continuous slot aids plug ejection. The deeper saw body permits cutting typical 2-by dimensional lumber in a single pass.
Project Ideas
Business
Event Coasters & Branded Swag
Produce batches of 4-1/4 in wood coasters from reclaimed lumber and sell custom‑engraved sets for weddings, breweries, and corporate events. Fast plug ejection boosts throughput; offer finishes and logo engraving.
Boat/RV Cup Holder Retrofits
Offer a mobile service installing drop‑in cup holders in boats, RVs, golf carts, and patio furniture. The bi‑metal holesaw cuts fiberglass, aluminum, and plastic cleanly; upsell stainless insert holders and LED‑lit options.
4-inch Duct/Vent Cutout Service
Specialize in cutting precise holes for 4 in dryer vents, bath fans, and grow cabinet ducting through wood siding, thin sheet metal, and plastics. Provide grommets, backdraft dampers, and exterior hoods as a package.
AV Cabinet Cooling Upgrades
Retrofit entertainment units and retail display cabinets with 4-1/4 in vent arrays and fan mounts. Include mesh inserts, dust filters, and temperature‑controlled fan kits; market to home theater installers and IT closets.
Speaker/Hardware Cutout Panels
Sell maker‑ready panels with 108 mm cutouts for 4 in speakers, desk grommets, or inspection ports. Offer CNC‑squared panels with your holesaw‑cut openings in MDF, birch ply, or aluminum, plus gasket and grill add‑ons.
Creative
Rustic Wood Coasters & Ornaments
Use the holesaw to produce uniform 4-1/4 in wood disks from reclaimed 2x stock in a single pass. The large plug-ejection slot speeds production. Sand, stain, and personalize with paint, pyrography, or laser engraving to create coasters, photo ornaments, or game tokens.
Pet Hideout/Nest Entrances
Cut clean 4-1/4 in entrances in plywood or 2x lumber for hedgehog, guinea pig, or small cat hideouts, or small owl boxes. The deeper saw body handles typical 2-by thicknesses, and the bi‑metal edge stays sharp through knots and occasional screws.
4-inch Speaker Enclosures
Make compact speaker boxes with precise 108 mm cutouts for common 4 in drivers. The bi‑metal edge also lets you cut thin sheet metal for automotive door cards or grills, and plastics for faceplates or rings.
Ventilation Ports for AV Cabinets
Drill a neat pattern of 4-1/4 in vents in media cabinets, closets, or grow boxes to improve airflow. Line holes with mesh or 3D-printed grills. The tooth geometry clears chips fast in plywood, MDF, and plastic.
Drop‑in Cup Holder Openings
Add cup holder holes to patio furniture, boat/RV panels, or shop carts. Many marine/RV insert cup holders fit near this size; fine‑tune with a sanding drum. The bi‑metal saw handles wood, aluminum, and thin stainless.