The Bintiva Hexagon shaped dumbbell set features a solid iron core . and is encased in hex shaped rubber for ultimate user safety and stability. They feature textured contoured chrome handles for ultimate user experience. They are crafted with gym garde materials . and are built for commercial use. The hexagon shaped rubber coating increases durability . protects the exercise floor . and reduces noise. The attractive dumbbell weights can be used in commercial or home settings . by both men and women. The free weights are great for workouts . strength training . and rehabilitation exercises.