Features
- Bi-metal construction for durability and multi-material cutting
- Tooth geometry optimized for chip removal and longer life
- Large continuous slot for easier plug ejection
- Deeper saw design to cut 2-by dimensional lumber in one pass
- High-speed steel cutting edge sized for wood, metal, and plastic
Specifications
| Hole Diameter | 4-1/8 in (105 mm) |
| Product Diameter (Mm) | 105 mm |
| Cutting / Maximum Drilling Depth | 1-3/4 in (44 mm) |
| Blade Material | Bi-metal (HSS cutting edge) |
| Pilot Drill Diameter | 0.25 in (1/4 in) |
| Minimum Chuck Size | 1/4 in |
| Contents | 1 hole saw |
| Number Of Pieces | 1 |
| Case Included | No |
| Kit | No |
| Color | Yellow |
| Made In | USA (made in the USA with global materials) |
| Upc | 885911630214 |
| Weight | 1.07 lb |
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Bi-metal hole saw with a high-speed steel cutting edge for cutting wood, metal, and plastic. Features tooth geometry intended to improve chip removal and extend cutting life, a large slot for plug ejection, and a deeper body profile to allow cutting 2-by dimensional lumber in a single pass. Constructed in the USA using global materials.
Project Ideas
Business
Desk and Counter Cable Grommet Retrofits
Offer a mobile service to add 4 in cable grommets or pop-up power modules to office desks, home studios, and countertops. The 4-1/8 in size matches many 4 in grommets; the bi-metal saw handles laminate, wood, and thin sheet metal desk skins. Charge per hole and bundle with cable management.
Vertical Planter Boards for Sale
Produce cedar or reclaimed-wood planter panels with 4-1/8 in cutouts sized for common 4 in nursery pots. Sell locally and online with options for drip trays and mounting hardware. The deep body allows fast production in 2x stock; the plug-ejection slot speeds throughput.
Etsy Blanks: Coasters and Wheels
Batch-cut and sand 4-1/8 in wooden disc blanks and sell them to crafters as coasters, mandala bases, or toy wheel sets. Offer different woods and thicknesses. The uniform pilot hole can be retained for wheel axles or filled for coasters, reducing waste and setup time.
Custom Raised Pet Feeders
Build personalized pet feeding stations with 4-1/8 in bowl cutouts sized to clients’ dishware. Offer engraved names, height options, and waterproof finishes. Market to pet boutiques and online, and upsell matching food storage bin lids using the same cut size.
Van/RV Upfitting Cutout Service
Provide on-site precision cutouts for 4 in duct flanges, speakers, grommets, and canless lights in van and tiny-home builds. The bi-metal hole saw cuts wood, plastic, and thin sheet metal safely. Package services with sealing, trim rings, and component installation.
Creative
Fence/Wall Vertical Garden
Cut 4-1/8 in holes in cedar fence boards or pallet wood to press-fit standard 4 in nursery pots or terracotta planters. The bi-metal edge lets you cut wood and thin metal planters alike. Make a grid of holes, back the board with landscape fabric, and slip pots in from the front for an easy-to-water herb or succulent wall. The deeper body cuts cleanly through 2x lumber in one pass.
DIY Bluetooth Speaker Boombox
Many 4 in full-range drivers and passive radiators need roughly 4-1/8 in cutouts. Use the hole saw on MDF or plywood baffles to mount two speakers and a passive radiator, then add a Bluetooth amp. The tooth geometry helps eject chips to keep cuts clean in dense sheet goods. Finish with grill cloth and a handle for a portable build.
Recessed Lighting and Ceiling Speakers
Cut precise 4-1/8 in openings for modern 4 in LED canless downlights or compact ceiling speakers. The bi-metal teeth handle drywall, wood paneling, and thin metal ceiling tiles. Use the pilot bit to start cleanly and the large slot to remove plugs without tearing paper facing.
Coaster and Toy Wheel Blanks
Use the hole saw to create uniform 4-1/8 in wooden discs from hardwood offcuts. Sand and finish as drink coasters, resin-inlay art, or toy wheels. The 1/4 in pilot hole doubles as a centered axle hole for simple wooden carts; plug it with a dowel for coasters.
Raised Pet Feeder Stand
Recess stainless or ceramic bowls into a custom-height feeder by cutting 4-1/8 in openings in a 2x board. The deeper saw body clears 2-by stock, and the clean cut edge supports bowl lips. Personalize with pet names and add a food-safe finish.