The one-piece high quality cast iron plates are hand crafted and inspected and a tough, premium rubber casing made from virgin and recycled rubber covers each plate. Recessed Triple Grip handles over spacious openings are rounded with integrated finger slots for easy loading and offloading and make these plates fit comfortably in the hand. The 2" solid steel precision-tooled hub ensures a perfect fit on Olympic bars. And for easy identification, weight numbers are molded into each plate.