Amazon Basics Comb Binding Machine - 21-Hole, Grey, for Office, School, and Home Document Binding | Perfect for Reports, Presentations, and Booklets

I had several 'books' to bind, each about 100 pages, and with cardstock front and back covers. I bought this machine because it was cheap, and I didn't really anticipate using it again once I had made the books.I was able to successfully make a perfect book on my first attempt. The machine is relatively straightforward to use, and it's difficult to mess up as long as you take your time and are careful.The instructions aren't very good, so I watched a youtube tutorial. I kind of wish I hadn't though, because I figured out a better way of doing it.Instead of trying to hook each sheet onto the comb, I found it was much easier to stack the entire book as a block, then hold in in place while slowly pulling the lever to close the comb, capturing all of the pages at once.I would say the claimed 12 sheet punching capacity is quite optimistic. I was punching standard 2lb copy paper, and I found I could punch a maximum of about 8 sheets at a time without feeling like I was going to damage the machine.This is fine for small-scale production though. Once I got the hang of it, I found I could make a book in just a couple of minutes.I made a mistake with one of my books (printed the pages wrong) and I was able to use the machine to easily open the comb back up, remove the offending pages, and replace them with corrected versions.Once I had finished my books, I was looking around the house for other stuff I could comb-bind.I don't need the machine any more now I have my books made, but I'm glad I have it, and will definitely get some use out of it in future.