All you future Arnolds or Mr. Olympias with a small place to exercise – forget about dozen of different dumbbells that take a lot of space. This is revolutionary adjustable (from 10 pounds to 90 pounds in 5 pounds increments) dumbbell  does the work of multiple dumbbells in one. Simply turn the dial mechanism and select the weight you want then lift it up. As you turn the dial upward, the handle latches on to additional weight plates, with an easy-to-read display telling you how much weight you’ve chosen.  It is great for toning or building a mass and heavy duty workouts. It is high quality made and is getting rave reviews everywhere and you can do any exercise with them..