Durable Rubber Coating - These dumbbells feature a protective rubber exterior, enhancing their longevity compared to conventional types. The rubber coating also prevents chipping and protects flooring and equipment Hexagonal Shape - The hexagonal shape solid cast iron with rubber coating ends ensure stability with flat edges that prevent rolling. This design feature makes them easy to store and use safely Comfort and Safety - Its contoured knurled grips help to prevent slipping so you can maximize your strength training routine Noise Reduction - The rubber coating diminishes noise, making them ideal for home gyms where quiet workouts are essential Variety of Size Selections - Available in 5-, 10-, 15-, 20-, 25-, 30-, 35-, 40-, 45-, and 50-lbs. This listing is for single (1pc) rubber hex dumbbell