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Malco HC1 2 in. to 12 in. Sheet Metal Hole Cutter Accessory for 1/4 in. or Larger Drill, Multi

  • Based on 648 reviews
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Availability: In Stock.
Fulfilled by Amazon

Arrives Tuesday, Sep 29
Order within 8 hours and 19 minutes
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Pattern Name: Accessory


Features

  • Cuts 2"-12" (51-305 mm) holes in sheet metal including up to 20 gauge galvanized steel
  • Commonly used by HVACR and Roofing Professionals
  • Combination English/Metric diameter gauge
  • High-speed bearings assure perfect cutting balance and a long cutting life
  • Installs into the chuck of a standard electric drill as small as 1/4-inch
  • Made in the USA

Description

One Tool. Every Round Hole in Sheet Metal You'll Ever Need to Cut. Step bits chew. Hole saws bind. Knockout punch sets take time to set up. The Malco HC1 does none of that. It installs into the chuck of any 1/4-inch or larger drill in seconds, adjusts to any diameter between 2 and 12 inches in 1/8-inch increments, and cuts clean, accurate round holes through 20-gauge galvanized steel, aluminum, copper, and 22-gauge stainless. HVAC installers use it for register openings and collar holes. Sheet metal workers use it for take-off cutouts and equipment knockouts. If the hole is round and the material is metal, this is how you cut it. The Gold Standard bits earn that name. The distinctive gold cutter bit, sealed bearings, and pivot pin aren't marketing, they represent Malco's longest-lasting, fastest-cutting, easiest-adjusting hole cutter design. The mill-type cutting edge wears only in the dimension of the material thickness, so you get multiple cutting lives from a single bit by sliding it up or down to expose a fresh edge. Precision-fit sealed bearings keep rotation smooth and vibration-free at full cutting depth. Replacement bits are available in singles (CB) or 6-packs (CBB). Lightweight, portable, ready to work. The aluminum frame keeps the HC1 light enough for a tool pouch without trading away rigidity. It travels between jobs the same way your hand tools do without the need for a case or dedicated storage. Same replacement parts as the HC2, so one set of spare bits covers your full Malco hole cutter lineup. For 2"–20" holes: see Malco HC2. Replacement bits: CB (single) & CBB (6-pack). REACH/RoHS compliant. The HC1 installs into the chuck of any corded or cordless drill with a 1/4-inch or larger chuck and punches precise round holes through 20-gauge galvanized steel, aluminum, copper, and 22-gauge stainless. Adjustable in 1/8-inch increments across the full 2"–12" diameter range. The mill-type cutting edge wears only in the dimension of the material thickness being cut. When the active cutting zone dulls, slide the bit up or down to expose a fresh edge and keep cutting. Precision-fit sealed bearings deliver smooth, vibration-free rotation at the full rated capacity. The HC1's aluminum frame keeps the tool light without sacrificing rigidity. Fits easily in a tool bag or pouch between jobs with no dedicated case required. Installs into the drill chuck in seconds and stores just as fast. Cuts 20-gauge galvanized steel, aluminum, copper, and 22-gauge stainless steel, covering the materials commonly used in HVAC installation, ductwork fabrication, and sheet metal work. From register openings and collar holes to take-off cutouts and knockout holes, the HC1 delivers a clean, round hole. HC1 Hole Cutter 2" to 12" HC2 Hole Cutter 2" to 12" 2" Bi-Metal Hole Saw 4-1/8" Bi-Metal Hole

Manufacturer: ‎Malco


Part Number: ‎HC1


Item Weight: ‎15.2 ounces


Item model number: ‎HC1


Size: ‎not_applicable


Color: ‎Multi


Style: ‎Classic


Finish: ‎Gold


Material: ‎Aluminium


Pattern: ‎Accessory


Shape: ‎Circle


Power Source: ‎Hand Powered


Wattage: ‎200 watts


Item Package Quantity: ‎1


Number Of Pieces: ‎1


Cutting Diameter: ‎1.25 inches


Measurement System: ‎Inch


Grit Rating: ‎36


Grit Description: ‎Fine


Included Components: ‎stand


Warranty Description: ‎Lifetime warranty


Assembled Diameter: ‎1.25 inches


Date First Available: June 15, 2006


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Sep 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Gear product
Works as described.
Reviewed in the United States on January 2, 2026 by AmazonLover

  • Great tool!!
This new rendition has solved the problems of their prior product! The cut was absolutely perfect and smooth. It’s really easy to use. Seems a lot more durable than its predecessor. Good value for the workman. Fits all drills pretty much It cut this 8 inch hole perfectly in HVAC flat stock for my kitchen fan. ... show more
Reviewed in the United States on October 24, 2025 by Thomas Ross

  • Amazing!
I needed to drill out a lot of 4" holes in tin on my metal shop for lights, thought a carbide hole saw would work... don't even try it. I used a 1/2 bit as a starter hole and then used my Makita nibbler, it sucked but worked. I then saw this tool used on some social media post by a guy that builds barndos for a living. Bought this and holy crap, I will forever use this for holes in tin. Cuts like butter even on my thicker gauge PBR panels. PERFECT holes, fast and easy. Built well, heavy duty. Genius idea! GET ONE! ... show more
Reviewed in the United States on September 25, 2024 by T. Morgan

  • Essential tool for HVAC
It’s a magnificent tool makes everything go really fast extremely easy to use would recommend for any HVAC project cuts like butter, easy Peezy lemon squeezy.
Reviewed in the United States on January 20, 2025 by Russell Hudler

  • Expensive but works well.
Works well but the item arrives in damaged condition. Manufacture was made aware and suggested returning. The damage is going to happen any way since the frame is not inside the clamshell allowing it to get dinged and banged around. Ours had several chips in the powder coated paint. Using it is super simple but is easiest with a second helper. The drill needs to be high speed and this thing saves a lot of time making those duct work cut outs. Would recommend even if you only plan a few cuts. The cut finish is awesome like a laser cut. Price is a little high for such a simple tool but the end results show why you bought it. Suggestion to manufacture: include a pouch for the tool and allen key along with a spare cutting bit. The price is high enough to do this at no charge. ... show more
Reviewed in the United States on April 27, 2018 by MG

  • Must have HVAC tool
Great time saver. Sharp bits and perfect circles
Reviewed in the United States on November 14, 2025 by weka0504

  • Tip to Reduce Bit Breakage
Overall a great tool. Perfect for round holes in sheet metal duct. But, I broke the first bit on my second hole in 26 gauge duct. Forty holes later, (6" to 12") I am still using the second bit. The trick was to use a screwdriver/drill combo. I put the drill in the screwdriver mode and reduced the torque setting to its lowest value (1 for my drill). It cuts just as fast as before, but as soon as the bit catches for any reason, rather than breaking, the torque clutch releases and the bit stops turning. Release the drill trigger, move back a little (1/8") and start again. The clutch releases once or twice per hole, but this slight delay is well worth not having to buy bits every few holes. Another thing I started doing was to not finish each hole as this is where the bit seems to hang for me. I leave about 1/4" uncut, then I finish the cut with tin snips. ... show more
Reviewed in the United States on March 7, 2014 by Amazon Customer

  • Great Product
I used it on round metal duct Worked great Not one issue I would buy again Worth every penny
Reviewed in the United States on April 14, 2024 by Scott McCollum

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