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.

Synclastic Pliers 3/8" These pliers will form synclastic shapes like bracelets, hoop earrings and any other form that requires a concave surface. They are very easy to use. The 3/8 forms deep syclastic forms, 1/2 and 3/4 will do simlar forms but with less curve. Can be used with copper, silver, gold, brass, even stainless is possible. Aluminum works fine as well.

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

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

Pancake Die R001A Ring/Bail  2 3/4" Long x 5/8" Widest Point

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