LifeSmart Click and Go Selectable Dumbbells with Matching Stand (5 to 30 Pounds) Adjustable dumbbells with easy-to-use Click and Go system Selectable from 5 to 30 pounds in 5-pound increments 5-position knob locks in place for easy weight selection Commercial-grade cast-iron plates and ergonomic grips Matching rack holds dumbbells at accessible height