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 24mm, 18mm and 14mm per side. Requires rubber sheeting (sold separately) for forming metal. Does not require a hydraulic press- a hammer and two bench blocks may be used.