The Rubber Hex Dumbbell features durable rubber-covered heads for increased safety and comfort. The rubber coating increases durability, protects flooring and equipment, enhances appearance, diminishes noise, and is easy to clean. The heads are permanently affixed to a thick solid steel shaft improving the strength of the head / handle joint. The knurled chrome handles are ergonomically contoured to fit comfortably in the palm of the user. Rubber Hex dumbbells are a great addition to any workout space.