These 3-hole painted weight plates are made of high-density solid cast iron for maximum durability. The high-temperature baking paint surface is rust-resistant, wear-proof and less prone to chipping. The ergonomic 3-handle design makes loading, unloading and carrying easier. With standard center hole diameter, they fit Olympic bars perfectly. Ideal for squats, bench press, deadlifts and full-body strength training, suitable for home gyms, fitness studios and commercial gyms.