StairMaster Pair of TwistLock Adjustable Dumbbells
The Stairmaster Twistlock is nothing short of badass. This company took an opposite look at the adjustable dumbbell and allow you adjust the weight from the handle instead of the outside. The Twistlock offers a weight range between 5 and 50 pounds in 5 pound increments which is perfect for most users. The unique way which users select the weights is also great because it keeps the weights tight to the handle and prevents any movement or shifting during a workout. The weights are covered in a plastic specially designed for high impact use and this set is also backed by a two year warranty.