Here is another adjustable dumbbell that replaces multiple weights to save you space. The PowerDyne 80lbs Adjustable Dumbbell can be adjusted from 5lbs to 80lbs. It has a non-slip grip. It can replace 16 weights.
The PowerDyne Adjustable Dumbbells use high grade iron weight plates. You simply have to rotate and align the handle grip to the desired weight number after pulling out the pin boxes.