This is a great binding machine that I bought on Amazon.
I use it to create books from my coloring printables. I simply print, make the holes, and bind them together with combs. It cuts cardstock very well (max. 2 sheets per cut), and I love that it comes in Pink. 🩷
The combs that come with it are the small 3/8 size, so I also have the 3/4 size for the bigger printables on cardstock.