GYMAX Dumbbell, 66LB Adjustable Weight Dumbbell Set, for Gym Home Workout Fitness Strength TrainingChangeable Weight Setting The dumbbell set is ideal for the exercise of your upper body, especially for huge arms. The weight is adjustable according to your physical condition. It makes your workout effective. Durable and Anti Rust for A Long Time Use Durable plates covered with black paint finish preventing rust and corrosion for lifetime use. Threaded Metal and End Collars for Strong Grip The barbell plates can strongly grip the metal threaded rod.