AMACO-A tool for making 7/16" round 5/16" x 5/8" oval and 1/2" bicone beads with clay. Create your own beads for bracelets ankle bracelets necklaces rings and more! Roll consistent uniform beads in 3 popular shapes-oval round and bicone. The Tri-Bead Roller is suitable for use with many kinds of clay including air-dry polymer and precious metal clay. Easy- to-follow instructions are enclosed.