Made by Tianse. I have a 21 hole comb binding machine. It came with 100 3/8" comb binding spines. I am a homeschooling mom and when the curriculum books come, they have a hard spine and it's hard for my kids to write in them and the books don't stay flat. I pull the pages out of the hard spine and use this comb binding machine to make my own spiral books. Create the ease of turning the page, pages lay flat, and write freely in your books.
Love it. I bet you have a ton of home school tricks up your sleeve!