Streamline Your Workout - Tired of switching between dumbbells and barbells? Transform your workout by connecting dumbbells to a bar, barbell dumbbells adapters offering extra versatility. Load your dumbbells and slide the adapters onto your bar in seconds, making dumbbell barbell setup a breeze. Strong and Durable - 3rd-party tested for strength and durability well beyond the intended use limits of each dumbbell converter to provide you years of muscle building workouts. Each Dualbell is designed to securely hold up to a 125lb dumbbell. Use two dumbbells per side if needed for added weight and strength training.