This is the Tonic Studios Die Cut storage binder. I was once a member of the Spellbinders Die of the Month Club. I had so many dies from that I had no idea what to do with them.
This is the medium size binder. It also comes in large. I like the medium size better because it is smaller and easier to work with plus it came with more magnetic sheets; 6 vs 3.
The medium binder comes with (6) 6 x 6 double sided magnetic sheets each in a clear envelope. I bought an additional 3 pack of refills. So now, the binder has 24 sheets in it. However, I only have 8 sheets front/back that are currently being used. It's pretty heavy as it is now, so I don't think I would be able to use all 24 sheets fully loaded with dies in this one binder. I would buy another binder down the road as needed.
The binder is easy to grab and use. The pages flip easily and magnetic sheets are strong. I have several pages with very small foliage dies and they do not move around or fall off.