These pliers will form synclastic shapes like bracelets, hoop earrings and any other form that requires a concave surface. They come in three sizes 3/8", 1/2" and 3/4". The 3/8" will form a deep synclastic form with tight radiuses. The 1/2" does similar with less curve. Note: Anneal your metal.

Double Cylinder Bracelet Making Pliers.  1 1/8" and 1 3/8" cylinders.

Double Cylinder Bracelet Bending Pliers 1 1/2 x 1 3/4

Double Cylinder Bracelet Bending Pliers 5/8" and 1".  Two different sized cylinders.

This die can be used with a hydraulic press or a hammer This die measures 2 5/8" long x 1/8" wide

1/2" x 1 9/16" or 13mm x 39mm 9mm x 8mm Bezel