These tough rubber dumbbells start at three pounds and go up to 100 pounds in five pound increments. They are perfect for building tone, increasing endurance and burning calories in a powerful workout. Our hex dumbbells are ideal for use in building your triceps, glutes, and pecs. These dumbbells features cast iron heads encased in virgin rubber for optimal performance. They are made to withstand hot and cold temperatures, resist cracking and peeling and will last for years to come. Dumbbells feature ergonomically engineered handles to make heavy lifting more comfortable so you can focus on building your muscles. Plus the Hex handles are convienent beause they won't roll around on the gym floor, making it easy for you to grab them and workout!