Features
- Bi-metal cutting edge for use on wood, metal, and plastic
- Tooth geometry designed to improve chip removal
- Large continuous slot for plug ejection and removal
- Deeper saw design capable of cutting 2-by material in a single pass
- Fits standard 5/8-18 arbor
Specifications
| Hole Diameter | 4-3/8 in (101 mm) |
| Cutting/Drilling Depth | 1-3/4 in (44 mm) |
| Blade Material | Bi-metal |
| Arbor Thread | 5/8-18 |
| Tooth Pitch | 4/5 TPI |
| Pilot Drill Diameter | 0.25 in (1/4 in) |
| Minimum Chuck Size | 1/4 in |
| Contents | 1 hole saw |
| Case Included | No |
| Applicable Materials | Wood, metal, plastic |
| Country Of Origin | United States |
| Upc | 885911630238 |
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Bi-metal hole saw with a 4-3/8 in (101 mm) diameter and 1-3/4 in (44 mm) maximum cutting depth. Features a bi-metal cutting edge and fits a 5/8-18 arbor. Intended for cutting wood, metal, and plastic.
Project Ideas
Business
Pre-drilled hydroponic lid kits
Produce and sell tote lids pre-cut with 4-3/8 in holes for 4 in net pots. Offer standard spacings (3–6 sites) for popular totes, plus bundled kits with net pots and air stones. Upsell custom layouts and branding for local growers.
Desk grommet and pop-up outlet installs
Offer on-site installation of 4 in cable grommets or pop-up power modules in office desks and conference tables. The bi-metal hole saw handles laminate, wood, and thin metal tops, enabling clean retrofits with minimal downtime.
4 in recessed LED retrofit service
Provide fixed-price packages to add canless 4 in LED lights in basements, closets, and kitchens. Use the 4-3/8 in cutter for consistent openings in drywall/wood, include patch rings if needed, and partner with an electrician for wiring.
Dryer/vent hood installations
Install or replace 4 in dryer vents and exterior hoods. The 4-3/8 in hole is ideal through siding, sheathing, and thin metal; offer sealed, code-compliant terminations and optional lint-line cleaning as an add-on.
4 in speaker adapter and baffle shop
CNC isn’t required—use the hole saw to produce precise 4-3/8 in cutouts for 4 in car/home speakers. Sell HDPE or plywood adapter rings, door baffles, and small enclosures online or to local audio shops.
Creative
Hydroponic herb tote lids
Drill 4-3/8 in openings in plastic tote lids to seat standard 4 in net pots for a compact DWC herb garden. The bi-metal teeth handle plastic cleanly, and the pilot bit keeps spacing accurate for neat, repeatable layouts.
Fence-board planter wall
Cut 4-3/8 in holes into cedar fence boards to accept 4 in nursery pots by the lip. Mount the boards to a wall or fence to create a modular vertical garden for succulents and herbs. The deeper saw design handles 2-by framing if you add a support backer.
Hardwood coaster and mini-clock set
Use the hole saw to create uniform 4-3/8 in wooden discs from hardwood offcuts. Sand and finish for coasters, add cork backing, or drill a center hole to insert a small clock movement for minimalist desk clocks. The plug-ejection slot speeds production.
4 in speaker boombox
Build a compact stereo boombox or bookshelf speakers using two 4 in drivers; most require a ~4-3/8 in cutout. Cut precise driver holes in plywood or MDF, then add a port and finish. The bi-metal edge can even cut thin metal grilles if needed.
Recessed shelf/closet lighting
Install canless 4 in LED downlights in shelves, soffits, or closets. Many models specify a 4-1/4 to 4-3/8 in cutout; this saw makes fast, clean holes in wood or drywall for a built-in, glare-free look.