Features
- Integrated one-piece design — no separate arbor or pilot bit required
- Impact-rated 1/4-inch hex shank compatible with most drills and impact drivers
- 8 TPI bi-metal teeth for cutting sheet metal
- Depth stop to help prevent breakthrough and control drilling depth
- Pilot bit spring for automatic plug ejection
- Designed for use with high-torque impact drivers
Specifications
| Part Number | HTWS |
| Contents | (1) 7/8 in, (1) 1-1/8 in, (1) 1-3/8 in |
| Diameters | 7/8 in; 1-1/8 in; 1-3/8 in |
| Working Length (In) | 1.75 |
| Shank | 1/4-inch hex |
| Teeth Per Inch | 8 TPI |
| Pack Quantity | 3 |
| Weight | 0.40 lb |
| Upc | 000346398380 |
| Claimed Life | Approximately 2× the life of standard impact-rated hole saws |
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Three-piece hole saw set with an integrated one-piece design and 1/4-inch hex shanks for use in drills and impact drivers. Bi-metal 8 TPI teeth are intended for cutting sheet metal. The set includes a depth stop to reduce breakthrough and control drilling depth, and a pilot bit spring for automatic plug ejection. The manufacturer states the saws provide approximately twice the service life of standard impact-rated hole saws.
Project Ideas
Business
Conduit Knockout-On-Demand
Offer a mobile service adding clean holes for electrical EMT fittings in panels, junction boxes, and enclosures. The included diameters align with common trade sizes (approx. 7/8 for 1/2 in EMT, 1-1/8 for 3/4 in, 1-3/8 for 1 in). Market to electricians and facility maintenance; emphasize impact-driver compatibility for fast, controlled cuts. Follow local code and de-burr edges.
Custom Vent and Cable Plates
Fabricate small-batch perforated plates and pass-through panels for PC builders, AV installers, and makers. Offer standard patterns (e.g., clusters of 1-1/8 in vents) and bespoke layouts for cable grommets or bulkhead connectors. Use the depth stop for consistent hole depth on thin stock; deliver de-burred, ready-to-install parts.
Upcycled Metal Decor Shop
Produce and sell lanterns, mobiles, and wall art built from sheet metal and the ejected plugs. The automatic plug ejection streamlines batch production. Sell on Etsy and at markets; offer custom patterns, patinas, and monograms cut as hole arrays.
Workshops and Team-Builds
Run paid classes where attendees make tin can lanterns or wind chimes. Provide pre-cut blanks and supervise drilling with impact drivers. Revenue from ticket sales and add-on kits; partner with breweries or makerspaces for venue and cross-promotion.
Control Panel Cutout Service
Provide precise cutouts in thin metal panels for industrial buttons and indicators. 22 mm pushbuttons typically require ~7/8 in holes, making this set ideal for rapid prototyping of kiosks, CNC control boxes, and simulator dashboards. Offer same-day turnaround with finishing options.
Creative
Upcycled Tin Can Lanterns
Drill patterned holes into cleaned tin cans or sheet-metal sleeves to create dramatic light spill for candles or LED tea lights. Use the depth stop to avoid blow-through and keep hole depths consistent. The spring-ejected plugs can be saved, painted, and glued as decorative studs on the lanterns.
License Plate Wind Chimes/Mobiles
Turn old aluminum license plates or thin sheet metal into wind chimes by adding 7/8–1-3/8 inch holes for hanging points and tone variation. The clean bi-metal teeth reduce burrs, and the automatic plug ejection speeds repetitive drilling.
Metal Mosaic Wall Art (Using Plugs)
Collect the ejected circular plugs and arrange them into geometric mosaics on wooden or metal backers. Paint or patina the discs, then epoxy them in patterns. The pilot bit spring makes gathering uniform discs fast for batch pieces.
Perforated Planter Wraps
Cut thin aluminum or steel into bands, perforate them with a repeating hole pattern, and wrap around glass jars or pots for an industrial planter/candle sleeve. The depth stop helps keep holes consistently spaced without tearing through the work surface.
Industrial Clock with Plug Markers
Use the ejected plugs as hour markers on a wood or metal clock face. Mix sizes (7/8, 1-1/8, 1-3/8) to emphasize quarter hours. Drill matching recesses or through-holes in a backing plate for an inlaid or backlit effect.