Features
- Bi-metal construction with high-speed steel cutting edge for use on wood, metal, and plastic
- Tooth geometry designed to improve chip removal and extend cutting life
- Large continuous slot for easier plug ejection and removal
- Deeper saw design allows cutting of 2-by dimensional lumber in a single pass
- Maximum cutting depth: 1-3/4 in (44 mm)
- Manufactured in the USA with global materials
Specifications
| Hole Diameter | 3-1/8 in (79 mm) |
| Cutting / Drilling Depth | 1-3/4 in (44 mm) |
| Blade / Body Material | Bi-metal (high-speed steel cutting edge) |
| Teeth Per Inch | 4/5 |
| Pilot Drill Diameter | 0.25 in (1/4 in) |
| Minimum Chuck Size | 1/4 in |
| Thread / Pitch | 5/8 in - 18 |
| Included Contents | 1 hole saw |
| Case Included | No |
| Applicable Materials | Wood (including nail-embedded), metal, drywall, plastic |
| Has Plug Eject | Yes |
| Color | Yellow |
| Country Of Origin | US |
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Bi-metal hole saw with a 3-1/8 inch (79 mm) diameter and 1-3/4 inch (44 mm) cutting depth. Designed for cutting through wood, metal, and plastic; includes a large slot for plug ejection. Constructed in the USA using global materials.
Project Ideas
Business
80 mm Desk Grommet Retrofits
Offer on-site cable pass‑through installs for offices and home studios. The 79 mm (3-1/8 in) hole matches common 80 mm desk grommets. Bi‑metal teeth let you cut wood, laminate, or thin steel desks cleanly. Upsell power grommets and cable trays.
Cabinet & Closet Puck Light Installs
Provide turnkey installation of 3 in recessed LED pucks/mini downlights in kitchens, closets, and retail shelving. The 3-1/8 in saw produces precise cutouts in wood, MDF, and drywall; pair with dust control and a template for speed. Package fixtures, drivers, and dimmers.
Hardwood Disc Blanks & Coasters
Batch‑produce 3-1/8 in wood discs from scrap hardwood and sell as blanks, engraved coasters, or ornaments on Etsy/at markets. The plug‑eject slot speeds production; finish by sanding, rounding over, and oiling. Offer custom laser engraving as an add‑on.
RV/Boat/Golf Cart Cup Holder Upgrades
Install drop‑in cup holders that call for ~3-1/8 in cutouts in plastic/composite panels and thin metal. Perfect for marine/RV refits and carts. Include sealing, drain lines, and stainless hardware. Sell holder options (with/without LED rings) as tiers.
Wildlife Nest Box Products
Build and sell species‑specific boxes (e.g., screech owl) that use a ~3 in entrance. The saw’s depth cuts 2x cedar faces in one pass for clean, repeatable openings. Offer installation, predator guards, and site consultations as premium services.
Creative
Pillar Candle Block Trio
Drill 3-1/8 in recesses into 4x4 or 6x6 lumber to seat 3 in pillar candles. Vary pocket depths (0.75–1.25 in) for visual interest, chamfer the rim, and drop in a thin metal or tile insert for heat safety. The saw’s 1-3/4 in max depth lets you do deep, clean pockets in one pass.
Giant Checkers & Game Tokens
Use the ejected plugs as uniform 3-1/8 in wooden discs. Sand, paint/stain two colors, and clear coat for a backyard checkers set or tic‑tac‑toe tokens. Add magnets to the back for fridge games. The large slot makes plug removal quick when batch-cutting.
Screech Owl Nest Box
Build a cedar nest box and cut a 3-1/8 in entrance (suited to many screech owl plans that call for ~3 in). The deeper saw handles 2-by stock in one pass. Add a predator guard ring (another 3-1/8 in cutout) and vent/drain holes with smaller bits.
Sauce Cup Charcuterie Board
In a serving board, drill 3-1/8 in drop-in pockets to fit stainless condiment/ramekin cups that spec ~3-1/8 in cutouts. Test-fit your cups, then cut 0.5–1 in deep recesses, sand, and oil. Great for dips, olives, or spice bowls.
Puck-Lit Floating Shelves
Install 3 in LED puck or mini downlights in hollow or thick shelves by cutting 3-1/8 in openings (many fixtures call for ~80 mm cutouts). Route wiring in a back channel and add a diffuser ring. Verify fixture cutout spec before drilling.