Just imagine if you could replace a room full of weight machines with one piece of fitness equipment without it costing you an arm or a leg! Well adjustable dumbbells might just be the solution you've been looking for.Adjustable dumbbells are one of the best investments you can make in your home gym. If you still need convincing, check out the following 5 reasons why you need to grab your own adjustable dumbbell set.1. Range of exercisesOne of the main advantages of dumbbells over traditional.