These cuff bracelets were made using metal bases that I picked from a flea market. The surface is rounded and is very handy for covering with clay as there is no need to use an adhesive to fix the clay to the base. Once the clay is baked on the base, it wouldn't come out unless forced. This is my first attempt at cuff bracelets and I can't wait to go and grab some more of these bases . Watch out for more of these soon!