Features
- Bi-metal construction for cutting wood, metal, and plastic
- Tooth geometry designed to improve chip removal and extend life
- Large continuous slot for plug ejection
- Deeper saw design for cutting 2-by lumber in one pass
- Maximum drilling depth of 1-3/4 in (44 mm)
- Made in the USA with global materials
Specifications
| Diameter (In) | 3-7/8 in |
| Diameter (Mm) | 98 mm |
| Drilling / Cutting Depth (In) | 1-3/4 in |
| Drilling / Cutting Depth (Mm) | 44 mm |
| Blade Material | Bi-metal |
| Contents | 1 hole saw |
| Case Included | No |
| Kit | No |
| Minimum Chuck Size | 1/4 in |
| Pilot Drill Diameter | 0.25 in |
| Fits Arbors | DAH9124PBM, DAH9121PBM, DAH9381PBM, DAH9383PBM |
| Color | Yellow |
| Made In Usa | Yes |
| Warranty | None (product not eligible for warranty) |
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Bi-metal hole saw designed for drilling openings in wood, metal, and plastic. Deeper saw depth allows cutting 2-by dimensional lumber in a single pass. Includes a large continuous slot to help eject cut plugs.
Project Ideas
Business
Custom Coaster Microbrand
Batch-produce hardwood coasters from hole-saw plugs with laser-engraved logos or epoxy inlays. Sell wholesale to breweries and coffee shops or via Etsy. Low material cost, quick batching, and endless design variations.
Cup-Holder Retrofit Service
Offer on-site installation of 98–100 mm cup holders in deck rails, boat consoles, golf carts, and patio furniture. Provide stainless/ABS inserts, drainage options, and color-matched caps. Fast, clean installs drive referrals.
Camper/Van Build Cutout Specialist
Mobile service to cut precise openings for 4 in speakers, cable pass-throughs, and small vents in plywood cabinetry and thin metal panels. Bi-metal teeth handle mixed materials; include templates and edge grommets.
Pre-Drilled Hydroponic Tower Kits
Sell ready-to-assemble vertical garden towers with clean 3-7/8 in cutouts for net pots. Include cups, drip emitters, and a base reservoir. Upsell nutrient packs and seasonal seedlings via subscription.
Custom Elevated Pet Feeders
Produce small-batch pet feeders with recessed bowl openings, size- and height-customized per breed. Offer name personalization and water-resistant finishes. Sell locally at markets and online with quick turnaround.
Creative
Hardwood Coaster Set from Cut Plugs
Use the hole saw to core 3-7/8 in disks from hardwood offcuts. Sand both faces, add chamfers, then oil or epoxy-inlay designs. The large slot helps pop plugs out quickly, so batching sets (with a simple coaster holder) is easy.
Built-in Cup Holders for Outdoor Furniture
Add 98 mm cup recesses to deck rails or Adirondack chair arms. Drill through 2x stock in one pass thanks to the deeper saw, then drop in 98–100 mm stainless/ABS cup inserts. Great for patios, docks, and firepit seating.
Compact Bluetooth Speaker Box
Build a small wooden boombox using a 4 in full-range driver. The 3-7/8 in hole matches many 4 in speaker cutouts; add a smaller port or passive radiator separately. Paint or veneer the enclosure and add a leather strap.
Vertical Herb Tower with Net Pots
Drill staggered 3-7/8 in openings in PVC fence post or pipe to accept 3.75–4.00 in net pots (verify fit). Plant strawberries or herbs. The bi-metal teeth handle plastic cleanly; lightly bevel edges for easier cup insertion.
Elevated Pet Feeder
Create a raised feeder and recess small stainless bowls by cutting 3-7/8 in openings in the top panel. Add removable bowls, rubber feet, and a wipeable finish. Personalize with pet names burned or painted on the front.