This Necklace Mandrel is essential to shape necklaces perfectly and easily. This Necklace mandrel is highly polished and made of hard-chromed cast iron and Perfect for forging, forming, shaping and sizing neckwear. Measures 7-1/2" wide by 7-1/4" deep by 4-3/4" high. Neck has an outside diameter of 3-3/8".