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.