weight plates

Weight plates are flat, heavy objects that are used in combination with barbells or dumbbells to produce a bar with a desired total weight for the purpose of physical exercise. Weight plates may incorporate holes for ease of carrying (called "grip plates") or be solid discs (especially those used for competition). They are typically round, although 12-sided and other polygonal varieties exist. Most plates are coated with enamel paint or hammertone to resist corrosion; more expensive varieties may be coated with chrome, rubber, or plastic. Weight plates are available in a range of weights. Common Olympic plate (50 mm center hole) denominations are in 1.25, 2.5, 5, 10, 15, 20, and 25 kg sizes, or 2.5, 5, 10, 25, 35, and 45 lbs, with 0.25, 0.5, and 50 kg, or 1.25 and 100 lb discs less commonly seen. Standard weight plates have a 1-inch hole in the center to fit on a standard barbell. They are both usually made of metal or rubber and can be used with a barbell or dumbbell. They also come in a variety of sizes and weights, ranging from 0.5 kg to 25 kg (in Europe). Weight plates are made of different materials, including cast iron, steel, rubber, and urethane. Cast iron plates are the most economical option, but they can damage floors and aren't very durable. Steel is more durable but also more expensive. Rubber-coated plates are quieter and less likely to damage floors, while urethane plates are the most durable and have the least odor.