Features
- Includes 7/8 in, 1-1/8 in, and 1-3/8 in hole saws
- 8 TPI bi-metal teeth for cutting sheet metal
- 1/4-inch impact-rated hex shank compatible with most drills and impact drivers
- Integrated one-piece design (no separate arbor or pilot bit required)
- Depth stop to reduce breakthrough and help control hole depth
- Pilot bit spring for automatic plug ejection
- Designed for use with high-torque impact drivers
- Manufacturer-stated longer service life versus standard impact-rated hole saws
Specifications
| Contents | (1) 7/8 in, (1) 1-1/8 in, (1) 1-3/8 in |
| Teeth Per Inch | 8 TPI |
| Shank | 1/4 in hex (impact-rated) |
| Working Length (In) | 1.75 |
| Pack Quantity | 3 |
| Part Number | HTWS |
| Weight | 0.40 lb |
| Upc | 000346398380 |
| Intended Materials | Sheet metal |
| Regulatory | Proposition 65 warning (see www.p65warnings.ca.gov) |
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Three-piece hole saw set with an integrated one-piece design and 1/4-inch hex shanks. Bi-metal 8 TPI teeth are intended for cutting sheet metal. The set is designed for use with high-torque impact drivers and most drills. Included features help control hole depth and eject cut plugs; no separate arbor or pilot bit is required.
Model Number: HTWS
Project Ideas
Business
Onsite Electrical Knockout Service
Offer fast, clean field knockouts in enclosures and panels sized to EMT standards: 7/8 in (1/2 in EMT), 1-1/8 in (3/4 in EMT), and 1-3/8 in (1 in EMT). The one-piece design speeds work, and the depth stop reduces blow-through. Upsell grommet/bushing installation and labeling. Ideal for small contractors who lack knockout sets.
Van/RV Upfitting Pass-Throughs
Provide mobile installation of precise wiring and hose pass-throughs in van and trailer sheet metal for solar, cameras, lights, and diesel heaters. Cut the correct hole, fit a weatherproof grommet or bulkhead fitting, and seal. Market to DIY vanlifers for per-hole pricing plus hardware.
HVAC/Duct Access & Sensor Ports
Create tidy openings in thin ductwork for humidifiers, sampling ports, and probe sensors. Supply matching rubber caps or grommets for service access. The impact-rated shank lets you work in tight spaces with an impact driver, increasing speed on retrofit jobs.
Custom Sign & Panel Hole Prep
Serve sign shops and makers by adding clean standoff mounts, cable pass-throughs, and grommeted holes to aluminum composite and thin steel panels. Offer rapid turnaround with a per-hole fee structure, including deburring and protective edge trim.
Stamped Disc Tags Micro-Factory
Turn the ejected slugs into products: pet ID tags, garden markers, and serialized equipment tags. Source scrap sheet, punch discs in the three sizes, deburr, stamp or engrave, and sell on Etsy or to local pet/garden shops. Low material cost and high perceived value.
Creative
Punched-Tin Lanterns and Sconces
Cut clean 7/8, 1-1/8, and 1-3/8 in holes into thin steel or aluminum cans/sheets to create repeating patterns for lanterns or wall sconces. Backlight with candles or LEDs for dramatic halos. Use the depth stop to avoid sudden breakthrough on curved surfaces, then deburr and clear-coat for a rustic finish.
Negative-Space Wall Art Panel
Lay out a geometric gradient or constellation using the three hole sizes on a sheet-metal panel. Paint the panel and mount LED strips behind to glow through the holes. The plug-ejection gives you intact circular slugs you can paint and reattach as contrasting ‘dots’ on standoffs.
Upcycled Disc Jewelry and Key Fobs
Use the ejected plugs (slugs) as solid metal discs for pendants, earrings, and key fobs—no center pilot hole to hide. Deburr, sand to a brushed finish, stamp initials or patterns, then add a small side hole with a regular bit for jump rings. Mix slug sizes for layered pieces.
Birdhouse Vents and Entrance Rings
Cut neat entrance holes in thin sheet-metal-faced birdhouses or feeders and add matching 7/8–1-3/8 in vent rings for airflow. Press in rubber grommets or rolled-edge trim to protect birds. The built-in depth control helps prevent damaging inner panels while cutting.
Industrial Wind Chime from Slugs
Collect the round slugs, polish or patina them, and stamp numbers or symbols. Drill a tiny offset hole and string them in tiers with spacers so they gently strike each other. Mix different metals (steel, aluminum, copper sheet) for varied tones.