Features
- Punches up to 10 gauge mild steel and 12 gauge stainless steel
- Laser-etched markings to identify size
- Threads onto a draw stud (sold separately) for punch and die setup
- Intended for use with a compatible hydraulic knockout tool (sold separately)
Specifications
| Punch Diameter | 3 in |
| Material Capacity | Up to 10 gauge mild steel; up to 12 gauge stainless steel |
| Opt Sku | DW-DCE600300P |
| Mpn | DCE600300P |
| Upc Gtin | 885911796439 |
| Product Type | Knockout Punches & Dies |
| Shipping Weight | 2.50 lb |
| Price Usd | 239.00 |
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3-inch knockout punch for creating conduit holes in sheet metal. Intended for use with a compatible hydraulic knockout tool. Capable of cutting through specified sheet metal gauges; includes size markings and threads for attachment to a draw stud (sold separately).
Project Ideas
Business
Mobile knockout service for trades
Offer on-site 3-inch conduit and pass-through holes in panels, junction boxes, and mild/stainless sheet up to 10/12 ga. Target electricians, HVAC, and facility maintenance. Price per hole plus travel (e.g., $25–$60/hole depending on material) and guarantee clean, centered cuts using a hydraulic driver.
Enclosure customization shop
Provide pre-punched NEMA and OEM equipment enclosures: customers send layout drawings, you punch precise 3-inch openings for conduit hubs, fans, or glands. Add upsells: deburring, grommets, labels, and powder coat. Sell locally and via an online configurator with tiered turnaround.
Food truck and van upfitting
Specialize in clean 3-inch cutouts for service pass-throughs, cable glands, and vent terminations in stainless/aluminum panels used in mobile kitchens and vans. Partner with upfitters; bundle punching with flange/gasket installs and compliance labeling. Market as no-spark, no-warp cuts versus hole saws.
Tool rental + training kit
Rent a compatible hydraulic knockout driver with your 3-inch punch and draw studs to local contractors and maker spaces. Include a quick-start guide, template magnets, and safety gear. Charge a daily/weekly rate and deposit; offer optional on-site setup or first-hole calibration for an added fee.
Pre-punched metal products
Manufacture and sell items that leverage clean 3-inch perforations: fire pit wind screens, garden trellis panels, radiator covers, and modern privacy screens. Standardize sizes and finishes, keep material within tool capacity, and sell on Etsy/Shopify with custom layout options for a premium.
Creative
Industrial porthole lamps
Punch 3-inch openings in sheet steel or stainless to create porthole-style shades or wall sconces. Back the holes with frosted acrylic or tempered glass and LED strips for a warm, diffused glow. Arrange holes in patterns for a modern, nautical aesthetic; powder-coat the metal for a finished look.
Perforated room divider/screen
Design a geometric partition, radiator cover, or wall art panel by laying out a grid of 3-inch holes in mild steel. The large, uniform openings create striking light/shadow effects and airflow. Frame the panel with angle iron, then paint or powder-coat to match interiors.
Planter boxes with 3-inch cups
Fabricate rectangular sheet-metal planters and punch 3-inch side openings to accept net pots or small nursery cups for herbs and strawberries. Add mesh or grommets if needed, and line with landscape fabric. The holes provide modular planting sites and great aeration.
Smoker/BBQ vent plates
Make adjustable intake/exhaust vents for smokers by punching 3-inch ports in a flat sheet, then overlaying a rotating cover plate with matching holes and a handle. Add detents to lock positions. Stainless versions withstand heat and weather.
Mailbox or door porthole accents
Create a modern façade by punching 3-inch windows in a flat metal door skin or mailbox faceplate, then inserting clear or tinted acrylic discs from behind. Seal with silicone or gaskets for weather resistance and add LED backlighting for nighttime appeal.