This item 1356-04 is a package of ten jewellery quality crystal rivets. They are 10mm in size. They can be easily set with Tandy's Synthetic Rivet Setter Kit 3462-00 that is also found in our store stecksstore. These rivets add a great western fashion flare to leather belts, buckles, garmets and handbags. They can be used on leathers as heavy as 8 to 270mls.