CARL Heavy Duty Rotary Paper Trimmer 18inch - 12238

I invested in this to perfect the colouring book I'd made for my littlest sister 🐾 It certainly did what it said on the tin! It sliced through 10 sheets of thin card plus 2 sheets of 300gsm gloss card with no issue at all.It takes a few slices up and down but it's not physically difficult whatsoever and it made quick work of this book, plus a couple other books I'd made with the same thickness! I popped the book in as is, which is 4mm thick when closed. I'm pretty confident it could handle thicker stock, too!The magnetic ruler is pretty awesome and the whole guillotine didn't slide about on my smooth wood table. The way you clamp the blade ruler down before use holds your work strongly in place, but I'd recommend holding it down yourself too to ensure maximum precision.I've only used it 3 or 4 times thus far so I can't comment on durability over years, but I should hope for the price and based on how sturdy it seems right now that it's gonna provide years of smooth.like.butter 😂

Cuts easily and accurately through chipboard and several layers of other thickness of paper/card. Wanted it to cut mainly chipboard and I can’t fault it as it works so well.

Clamps 30+ pages at a time and cuts through all with a few swipes. The fluorescent ruler makes it easier to line up the cut

Just what I needed for cartonnage - see picture - thick greyboard cut easily - cant think how I managed without it

I have the 18”. I use it to cut 2mm mdf and 2.5mm greyboard for crafting. It cuts the greyboard with hardly a thought but the mdf (chipboard, artists board, call it what you will) takes a lot more effort anything from 15/20 passes. However it cuts accurately and pretty cleanly and, importantly, squarely. I tend to get bevelled edges with a Stanley knife and safety ruler despite my best efforts. It takes up a lot of desk space in use, but it’s not too heavy so easily stacked vertically in a shelf or on the floor against a wall (where mine lives) to free up space. I’m very happy with it.Updated - So a couple of weeks later. A new project required cutting 2mm mdf, which had to be accurate to the mm (previous cuts had been less critical so I hadn't picked up on the accuracy) and found that it's actually 1mm short. I measured and double checked everything, and liaised with others who use this cutter, and in the end I discovered its the magnetic guide itself. 2 things. 1. It has play where it sits on the top and bottom bars, so I ended up masking taping the area that clips onto the bars, and it now fits snugly. 2. But the main thing is that the guide isn't square. It sits perfectly on the cutter bed, but then slopes very slightly outwards toward to top, so that the thicker the material or pile of paper, the more margin there is for error. I have included 2 photos taken against a right angle ruler which I hope shows the problem, one with the guide resting normally on the ruler and the other on its side. Either way it shows a gap that wouldn't be there if it were square. Now that I know that, I use the right angle ruler to measure and butt the board against, and use the guide to hold the ruler steady. It now cuts accurately no matter the thickness. Down to 4 stars because I (and others before me it seems) shouldn't have had to do the quality control research for the manufacturer, far less find a workaround. I was going to return it, but now that I know the problem I'll keep it, since otherwise it's a good cutter.