MalcoREDLINE 5/8” J Channel Cutters –3/4” knockout – for drain tabs, downstream notch cutouts and miter trim cuts JCCR- Ergonomic Handle

I called Malco customer service before buying this cutter. My question was "what is the width of the notch this cutter makes?". Surprisingly, they couldn't answer the question and obviously had no specifications on the tool. Their answer was "we make our cutters to fit the industry standard size j-channel." So, if you purchase 1/2" j-channel, you should get the 1/2" cutter (JCCR50). JCCR50 makes a 5/8" wide notch. My 1/2" J-channel (Certainteed brand) needs a 3/4" notch. I also have Certainteed 3/4" j-channel and the "ideal" notch would be 15/16". Since this cutter (JCCR50) makes a 5/8" notch, I'm returning it for the JCCR.The tool itself feels heavy duty in hand, so I'm giving the tool 5-stars, but I think Malco could save a lot of money (on return shipping and handling) and customer frustration by just listing the actual notch size each model makes.

I have a 7/8" J-cutter that is about 20 years old. love it but needed a 1" cutterI like the new lock mechanism and the etched gauge is nice but my oldie has an adjustable stop that was nice so I didnt have to even look at the cutter when working my miters.overall its made well and functions great.

Excelente herramienta

Makes quick work of installing vinyl J channel around doors and windows

No sure what some people are talking about when they say this doesn’t work on 5/8” j. 5/8” j is 7/8” on the insideIt fits nice and snug inside the j and makes a perfect cut. I don’t think the people making those comments are carpenters. Tool is very sturdy I think it will last a long time with every day use 👍

Work good for the most part. I'm thinking bo to cold weather j channel shrink which make these just slightly to big to fit in 5/8 j. Can't wait to see if they work better once it warms up. I'd still recommend these because I'm pretty sure I'm correct about the temperature making the j channel harder to work with.

not great. Hard as heck to not notch the entire end rather than just cut for bending down flap. I messed with them trying to figure out a way to make it work but they are more of a hassle than just cutting the flap by hand.

Excellent tool for dressing the edges of J-Channel to be used to box around windows or other obstructions. Very solid feel to the "single click" to create a tab with little danger of squeezing too hard and removing the tab completely. With slightly more pressure, it is easy to completely remove the tab piece. It does not feel bulky or awkward to hold and use. Takes a tad of getting used to the gradations on the punch piece, but, hey, aren't we all teachable? I've never had any problems with Malco tools in the past and this device is no exception to that record. I would highly recommend it as an addition to your siding tool kit.

Pretty expensive ! But, a very good tool to have when doing siding.

Great quality. One of the most important tools you will need for around windows and doors. Easy to use, one click for tabs, squeeze all the way through for clean cutouts. Very happy with my purchase. Would totally recommend this tool.

Tool was of excellent quality and worked flawlessly.

These are the best thing since sliced bread. So quick easy to use . I read some of the reviews and totally disagree with them they will cut a full inch and as little as a half an inch. They work well and I wish I had a stumbled upon these along time ago

Works great for notching, needs a lite touch for drain tabs