This is a great product for anyone who is constantly cutting, regardless if it paper, chipboard, or leather. I use for all types and so far I am really pleased with it. It stores all the blades really nicely with a magnetic backing so that even when you place the knives in there prospective "groove" the magnetic keeps them stationary. Very clever and convenient. I has a pouch or "net" that holds refills which also is handy. Overall, I am very happy with this set. I allows you options for whatever detail work you are doing. For me personally the #2 is a God send because it is strong enough to handle leather work or rather the leather work I do. I create jewelry with leather and the #2 knives cuts it like butter. I was using the #1 knife out of sheer ignorance until I finally made the effort to seek out something that did not make me work so hard to cut my leather. Anyway...this storage unit is SOLID and even if you drop it it is all good just because of how it is designed and the magnetic mechanism along with the actually construction of the case which is SUPER hard. I give this 6 stars if I there was a sixth category!!!!