Features
- Bi-metal construction for use on wood, metal and plastic
- Patented tooth form to improve chip evacuation
- Large continuous slot for plug ejection and removal
- Deeper cup design to cut 2-by material in one pass
- High-speed steel cutting edge
- Made in the USA with global materials (manufacturer statement)
- Manufacturer states up to 50% longer life vs prior generation when cutting black pipe
Specifications
| Hole Diameter | 2-1/8 in (54 mm) |
| Maximum Drilling Depth | 1-3/4 in (44 mm) |
| Drilling Depth (Listed) | 1.75 in |
| Blade Material | Bi-metal |
| Pilot Drill Diameter | 0.25 in (1/4 in) |
| Minimum Chuck Size | 1/4 in |
| Contents | 1 hole saw |
| Case Included | No |
| Kit Included | No |
| Manufacturer Part Number | DAH180034 |
| Upc | 885911630672 |
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Bi-metal hole saw for cutting wood, metal and plastic. Manufacturer states it is made in the USA with global materials and claims up to 50% longer life versus a prior generation when cutting black pipe. The saw has a patented tooth form to aid chip removal, a large continuous slot to assist plug ejection, and a deeper cup design intended to cut 2-by dimensional lumber in a single pass. Maximum drilling depth is 1-3/4 in (44 mm).
Project Ideas
Business
Mobile Door Lockset Installation
Offer on-site door knob/deadbolt boring—2-1/8 in is the standard U.S. lockset bore. Pair the hole saw with a door jig to deliver fast, accurate installs on 1-3/8 to 1-3/4 in doors; price per door with volume discounts for property managers and house flippers.
Office Cable Management Retrofits
Sell and install cable pass-throughs by adding 2-1/8 in grommet holes to existing desks, conference tables, and reception counters. Upsell matching grommets, wireless chargers, and brush inserts; market to co-working spaces and IT service providers.
Etsy: Challenge Coin Display Racks
Produce wall racks and desktop stands with rows of 2-1/8 in recesses sized for 2 in coins. Offer customization (laser-engraved unit logos, nameplates), varied woods, and felt colors—batch drill with templates for speed and consistent quality.
Birdhouse Kits and Predator Guards
Sell DIY birdhouse kits and standalone predator guard plates featuring precise 2-1/8 in entrances for species that prefer that size. Include education cards and habitat guidance; market to garden centers, nature clubs, and online hobbyist groups.
Custom Metal Tags and Signage
Use the bi-metal saw to cut 2-1/8 in discs from aluminum/brass for branded tags, table numbers, plant markers, and ornaments. Offer stamping/engraving and bulk pricing for wedding planners, florists, and nurseries; the large slot speeds plug removal for efficient production.
Creative
Purple Martin Birdhouse + Predator Guard
Build a nesting box with a precise 2-1/8 in entrance hole (ideal for martins) and add a screwed-on predator guard plate with the same diameter. The deeper cup lets you bore cleanly through 1-1/2 in cedar or pine in one pass, and the large slot makes plug ejection easy—use the plug as a removable clean-out cap or decorative badge.
Challenge Coin Display Board
Drill shallow 2-1/8 in recesses (stop before breaking through) to snugly seat 2 in challenge coins with a felt liner. Lay out rows on a hardwood board; the patented tooth form helps prevent chatter and burning, leaving crisp edges you can chamfer and finish for a premium look.
Metal Garden Tags and Ornaments
Cut 2-1/8 in discs from thin aluminum or brass sheet to make durable plant markers, gift tags, or holiday ornaments. Deburr the edges, stamp or engrave names, and punch a small hanger hole through the plug’s pilot mark—the bi-metal teeth handle light-gauge metal cleanly.
Desk/Nightstand Cable Pass-Through
Add tidy cable ports by drilling 2-1/8 in holes in desks, built-ins, or nightstands, then press-fit matching grommets or 2 in wireless charger pucks that spec a 2-1/8 cutout. The hole saw’s deeper cup handles typical furniture thickness in one pass for a clean, professional result.
Bird Feeder With Viewing Windows
Create a wooden bird feeder and drill 2-1/8 in circular windows on each side; back them with clear acrylic for weather protection. The chip-clearing tooth design leaves smooth cutouts in both wood and plastic for a neat, modern look.