Laser cut 1/2 or 3/8 inch thick, 3 x 3 inch hydraulic press dies for jewelry making. Custom made of clear polycarbonate, stronger than acrylic. Set of three sizes, approximately 11x41 mm, 9x32 mm and 7x25 mm. 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.