These are a great option if you don't have space for a big set but want a variety of weights. I use them with an exercise ball and can get a good hour workout at home. They do come as a pair (I read other reviews of the same brand but another size where this had been a problem). The weight adjustment knob is plastic, and I hope it lasts, but overall, the system seems well made. The weights stay firmly on the bar and feel safe.Product Description
Do away with your space-consuming dumbbells and consolidate to a single pair with the Stamina Versa-Bell II adjustable dumbbells. Offering a series of weight settings from 2.5 to 12.5 pounds (in 1.25-pound increments), the Versa-Bell II units do the work of nine sets of dumbbells in one, so you don't need to dedicate more than a few feet of space to your workout area. Each innovative Versa-Bell II dumbbell is outfitted with a single 2.5-pound handle connected to a dial mechanism. As you move the dial, the handle latches on to a different combination of steel weight plates, with a window display showing which weight setting you've chosen. Dial it down to 5 pounds and you'll lift only a single set of plates, but dial it up to 12.5 pounds and you'll get the whole combination. It's the easiest way possible to save space and money without sacrificing quality. Each dumbbell includes a durable, heavy-duty nylon weight tray but is also compatible with Stamina's SPS Versa-Bell dumbbell stand (sold separately).
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