Meet the NordicTrack Select-A-Weight: another adjustable dumbbell set that lets you work your arms, shoulders, back, legs, and core. You can adjust it from 10 to 55 pounds. No need to buy multiple dumbbells when you have something like this. The system lets you adjust weight quickly.
The NordicTrack Select-A-Weight set is available for $299 at this time. More info is available here.