Dumbbells are used to exercise all major muscle groups, including arms, chest, back, abs, legs and core. 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 perfect for training individual muscle groups or major muscle groups, HIIT workouts and walking. Built for durability, safety and comfort, the CAP Neoprene Coated Dumbbell Weights have an iron core made from ASTM A48 Grade 20 grey iron and are then precision dipped in 3mm of neoprene. Cast iron dumbbells are neoprene-coated for durability and to help protect you, the floor and other fitness equipment Help tone and sculpt your arms, shoulders and back Hexagonal shape for easy stacking and roll-free use Sold Individually UPC 702556130520 ASIN B00X70RZ1W Color Grey Style 12 pound Single Dumbbell Material Neoprene Brand Name CAP Barbell Item Weight 12 Pounds Manufacturer Cap Barbell, Inc. Handle Diameter 1.25 inch Handle Material Iron Number of Pieces 1 Target Use Body Part Arm Item Dimensions L x W 9.6 L x 3.5 W Global Trade Identification Number 00702556130520 Other Special Features of the Product No-Roll Head