The CAP barbell coated hex dumbbells feature a protective coating, diamond knurling, and a steel handle to provide long-Lasting performance. Adding resistance to any workout routine offers the user several benefits. The benefits of dumbbell exercises include muscle building, improving core strength, boosting balance, providing better bone health, burning calories, increasing energy levels, enhancing overall mood and more. Dumbbells are used to exercise all major muscle groups, including arms, chest, back, abs, legs and core. Target individual muscles by incorporating these dumbbells into your fitness regimen. The heads are made from sat a48 class 20 grey iron with a durable coating and providing a strong, durable product. Sold as a pair.