Malco HC2 Adjustable Hole Cutter from 2 inch to 20 inch |Cuts 20 Guage Galvinized Steel | Sheet Metal Hole Cutter Accessory | Impact Rated | 1/4 in. Hex Shank (2" - 20" (HC2))

This makes cutting holes a breeze

Just use a self tapper or 1/4 zip screw then let the drill bit eat. Must have for hvac installers during summer.

Works as it should. Love this product, it saves so much time.

Love these things. Do HVAC duct work installations, predominately metal duct work. Used many of them borrowed from co-workers. Bought this because we needed another. First hole worked beautifully. Then... the second hole and third weren't so, well round. The set screw slid from where I set it, locked it tight, but the paint caused it to slide out of place. Then when I tightened it more, the center pin broke. No worries had a backup. But the paint makes it slip from the setting, suggest scrape the paint off where the pin slides, just either side of the pin set. I'd go the entire length that way when you need to set for multiple holes, you won't have it slip on you.

Awesome product, easy to operate, make my life easy

Works perfectly for making your duct openings.saves a a whole bunch of time just be careful with the drill bit because it’s delicate so always have an extra

First time use. No instructions on how to use. Had to search around and found some basic Videos which does help, but more questions answered would have helped. Almost impossible to see and understand the Measurement marks to set your hole diameter. Cut a test hole and re-adjust your hole cutter diameter setpoint. Was replacing an AC Plenum. highly recommend first time users to cut out some practice holes in the old plenum first or another piece of sheet metal. I had problems. the first hole I tried to cut, the adjustable center piece on the cutter, sitting down in the middle of the hole, moved and slid a little as I was cutting the hole, so the hole got bigger, as I cut. I believe this was due to me not cutting at an angle and was pulling on it too much. Always turn clockwise and tilt at an angle and only go as fast as the cutter bit will allow. Don;t force it harder. I went much slower then the video;s showed and stopped and re positioned my hands to continue. Holes look perfect. Be-burred the hole edges a little afterwards and Duct taps fit perfectly.

This tool is the ticket. I have been doing maintenance work for some 40 years now and in my "favorite tool" box this is kept. I took on project of replacement and upgrade of my home HVAC duct system and without this I would have had many stiches from sheet metal snips. If you work with duct work and you like professonal results get one of these. Great tool!!

Have the HC-1.Used to cut 14" round holes in 24ga material. Works as good as the small one.

sweet tool, makes the job easy thanks