The Powerblock Sport 2.4 Adjustable Dumbbells provide a comprehensive weight training set for the home gym. The PowerBlock Sport Series can also be useful for personal trainers who provide their own equipment. The dumbells offer tapered handles, wrist supports which feature a more open design offering a larger handle cavity and the dial locks are recessed into the handle. The Sport 2.4 model is equal to and replaces the need for 8 pairs of traditional dumbbells. The weight range is 1.5kg-11kg per hand. The Sport 2.4 cannot be further expanded. The dumbbells are supplied as a pair.