Malco C5R 5-Blade Crimping Tool – Creates Leak-Proof Crimps on Round Duct & Stove Pipe, Compound Leverage, Ergonomic Handles

In the past used tricks like trimming the pipe and folding inward. Wanted to improve the outcome and process which guided me to crimper. With the reviews and price difference I bought these crimpers. Absolutely impressed!! Crimpers are very smooth to operate. Was surprised at how little you needed to squeeze the handle to achieve a factory looking crimp. Was able to crimp a female end on duct boot and turn into a male end. The fresh crimp slide right inside another female fitting and looked very professional. Also worked great for customizing straight pipes with joints. Highly recommended!!

I bought some expensive stainless pipe for my outdoor wood stove. But the pipe wouldn't fit in my stove collar! I called a friend who works in HVAC... he immediately described this tool to me. I looked around and found this one that's about $20 more than the imported ones, made in USA! I bought it, 90 seconds of crimping and my pipe fits like a glove. Nicely made, comfortable grip, shame I'll probably use it once or twice more in my lifetime. If you need this tool, buy this one.

I redid some downspouts with this adding transitions to 4" pvc pipe ( as should have been done by the installer) being able to cut and crimp on my own was great! and some of the original crimps that had been performed poorly were easily adjusted properly using this tool. I highly recommend getting this quality tool - not the cheapest but definately well made and made the project quick!

Is it possible to love a crimping tool? Now that I have used this one, I would have to say yes. I really did not want to spend the money on a tool just to make one pipe slide into another, so I tried to do my crimp with regular pliers. After failing at this for about an hour, I ended up with a bent up sheet metal boot that STILL wouldn't fit into the supply pipe. So I broke down and bought this tool. It really was more money then I wanted to spend, but it is top quality, made in the USA (Love the little window cut into the handle that allows the "Made In the USA" stamp to show through. Nice touch that shows pride in U.S. craftsmanship. See second picture) . Anyway, I went over my "botched plier" crimping disaster with this tool and a couple of minutes later I had straightened out my bent up boot, and it slid right in as if it had been crimped flawlessly at the factory. Wonderful! Thought I might need a new one, but this tool saved me the money I would have spent replacing it. Highly recommend. Will look at Malco first for tools now, and disregard the higher price . This tool will probably last forever, and I know that I will remember the quality of it long after I forget how much I paid for it.

The crimper works well for large round ducting just not so much for downspouts. Malco products are made pretty well and feel solid and heavy duty compared to others like Weiss which feel sloppy and lighter weight. I was under the impression from product descriptions the C5R would be more helpful crimping downspouts than the way I was doing it but, that's not the case. I wish the throat depth of the crimper was deeper and would also press a little deeper which I find the Weiss brand to do slightly better. So, I'll just continue doing it the way I did and return the crimper rumors save about 40 bucks.

These work pretty good. I only used it on a couple of projects and it did the job.

Muy buena calidad. Cumple con su función.

this is one of those tools you may not use daily but when you need it you will be glad you have it used it while installing dryer vent tube it work so good it made me feel like I was a pro... zeke

I'm *not* a ventilation guy, but occasionally I need to crimp some ends for fitment on some ductwork. I didn't like that other much cheaper crimpers were randomly mashing up my duct fittings and not giving me the outcome I needed. The Malco for some reason just gave me better results, has nice sharp interlocking blades (probably it's best attribute) and gave a better result than all the others I've tried. The most frustrating thing you can experience when doing that ductwork is a tool that will not perform up to expectations, and this seems to be a buy-once kind of tool. I was recommended this tool by my ventilation subcontractor and have not been unsatisfied with it since. Just open your wallet and free that trapped money ;-) Seriously though, if you can afford it, this is a solid choice and will not let you down, give consistent results and result in less time spent bending tin, compared to others I have had opportunity to try. I hope this helps.

This was exactly as described, a hand tool you can quickly and easily make a crimped end fitting

Latest batch of crimpers does not crimp correctly.. Blades are stopping almost flush... Company is 35 yo, 1st time I've seen this Going to remove lock stop to see if we can self rectify this issue

very helpful and great quality.

Being a sheet metal worker for over 30 years I'm very picky about the tools that I purchase to make my work and job easier and more efficient. Which is why I bought and trust Malco products which have been around for years. A bit more costly than other brands but worth it.