Replace up to 8 separate dumbbells with one when you use the PowerBlock Sport 24. This adjustable dumbbell is comprised of a weight range spanning 3-24 lbs. separated in 3-pound increments. FEATURES: Sold as a Pair Replaces 216 pounds of free weights or 8 pair of dumbbells Weight range 3 to 24 pounds in 3 pound increments Change weight quickly with patented selector pin Non-Expandable Increments: 3, 6, 9, 12, 15, 18, 21, 24 lbs. Warranty: 5 Year Limited