Multifunctional Free Dumbbells Weights Set 6 In 1Multifunctional Weight Dumbbells Sets: These Adjustable dumbbells can be combined into barbells or kettlebells according to your needs. The dumbbells have anti slip rubber handles so you will be able to work out without having to worry that the dumbbells will slip from your hands and fall. The screw caps have star bolts to make sure that the weight plates are always mounted firmly and secure on the bar. The bar of the dumbbell is made of strong