These weights are constructed from solid cast iron to provide a durable, long lasting product and coated in a baked enamel finish to prevent chipping and peeling. These weights features ground edges and machined 1-inch center holes. Whether you are using an adjustable dumbbell, barbell, or trap bars, these weights are made to fit on standard, 1-inch bars. Add these weights to your home gym and use them for cardiovascular fitness and strength training!