Laser cut 1/2 or 3/8 inch thick, 3 inch x 3 inch hydraulic press dies for jewelry making. Custom made of clear polycarbonate, stronger than acrylic. Set of three sizes, approximately 16mm, 26mm and 35mm diameter. Requires rubber sheeting (sold separately) for forming metal. Does not require a hydraulic press- a vise (or heavy hammer) and two bench blocks may be used.