Adjustable Dumbbells are great tools for strengthening and toning a wide variety of muscles including the biceps, triceps, deltoids, latissimus dorsi, quads, glutes, hamstrings, calves and core abdominals. The best option being you can increase or decrease the weight as per your training. Secure spin-lock collars allow you to effortlessly adjust the weight so your workout remains uninterrupted. Perfect for use in the even the smallest home gym there is no excuse for not getting in shape. With over 8-years experience in the world of gym equipment TnP Accessories is delighted to offer these fantastic dumbbell sets for a truly amazing price.