Hossejoy Adjustable Bookends, Heavy Duty Metal Book Ends Holder, Expandable Bookcase Book Stand Shelf Rack for Home Office School Library, Extends up to 48cm (Black)

This has a simple mechanism to hold books in place on book-shelf/case. My daughter was very pleased with it as aChristmas present. It was sturdy, functional and good value for money .

I've been using ring binders as long as I can remember, right back to early schooldays, and I've always had the same problem. They're wider at the spine than the front of the pages, and so won't stand up straight on a shelf. I am SO fed up with toppling folders! This thing is great! It actually makes them stand up in an orderly fashion. They look so much happier, and so am I. I'm going to order some more so that eventually ALL my ring binders will be happy binders!

Very pleased. It works well and keeps my books tidy on the dresser. Thank you