Here is another adjustable dumbbell that can replace multiple weights to save you space. The Lifepro PowerUp PRO 55lbs Dumbbell can be adjusted from 15lb up in 10lb increments. These dumbbells have a rubber handle for a non-slip grip.
The Lifepro PowerUp PRO dumbbells are pretty easy to use. Simply twist the handle till it clicks, and you are set. You can find out more about it here.