20LBS Set includes 1 Olympic dumbbell bars, pair of collar locks, 8x 2.5LBS coat iron weight plates.Made from solid steel, these bars are far more durable than hollow types and can support up to 100 LB. The chrome finish adds resistance to rust and wear.Designed for use with Olympic plates (2 34; holes), these bars let you create your own adjustable dumbbells saving both money and storage space.The rotating sleeves reduce stress on wrists and arms during curls or presses, especially when lifting heavier weights.Each plate features a durable baked enamel finish, effectively preventing rust and corrosion while ensuring long-lasting use without any unpleasant odor.