IRONWALLS A3 Steel Lightweight R6 R10 Commercial Paper Corner Rounder Industrial Punch Cutter Machine with Paper Holding Device Metal Heavy Duty 30mm Thickness for Office Business Factory | Manual Paper Corner Cutter, Heavy Duty Steel Corner Punch for Cardstock, Plastic, Metal Sheet, Corner Rounding Tool

This cutter machine is great and cuts through 6-ply mat board. Its a nice heavy duty machine and easy to setup and use.

this device is no joke. I have a job rounding thw corners if sign blanks made out of 1m8" ACM (plastic with aluminum skin on both sides) i had 100-s of these and was doing them by hand on a disk sander. qith thia tool i can do 10 blanks in the time it took me to do 1 before and the corners are perfect with no sanding needed. I have done over 150 blanks (600 corners) and it is still cuts as clean as the first time I used it.

This is the best investment for my small business. I was a bit worried because some of the reviews didn’t sound good - mainly issues with lining the guides up. It’s not that hard you just need to cut one corner how you like then push the blade down in the locked position and line up the guides to the paper or plastic (I used the plastic card that came with it). I tried ordering rounded corner notepads for my business and the manufacturer cuts were awful. I then ordered square corners and now I hand punch the corners myself. It’s easy to use and saves so much time. Best thing I’ve ever bought on Amazon for my business.

I used this to round the corners for a small booklet. It was very easy to use and die the job well. The quality of the cut was excellent. Size & weight were good for packing away until I needed it again.

This gadget makes crafting easier. I can order pointy cornered metal or chipboards and then trim them myself at the end of my project the cuts are clean and the device is easy to use. Not too heavy and not too light, I store it under my craft table when not in use.