3-in-1 Versatility: Use as dumbbells, a light barbell, or a heavy barbell for varied workouts. Strength Training Dumbbells. Rust-Resistant Dumbbells. This 20 lbs dumbbell set includes 4 × 2.75 lbs and 4 × 2.2 lbs weight plates, along with 4 dumbbell nuts, 1 connector, and 2 dumbbell bars, allowing you to customize the weight to suit your fitness level.