15 weight settings in 1 dumbbell set provides great functionality and saves space; can increase weight resistance in small increments, which helps prevent muscle strain and is better for building muscle strength and endurance; durable design; dial adjustment system does a good job of securing the plates to the handle, which eliminates clanking noises and pinching; comfortable grip, so weight lifting gloves are optional; great for P90x enthusiasts
Rubber coating provides a comfortable and secure grip; rubber coating means that dumbbells are less noisy; rubber coated dumbbells are less damaging to floors and other surfaces; weights are available in bright, fun colors; durable; subtle octagon shape means weights won't roll around