CAP Barbell"s Uniform Black Tri-weights with non stick neoprene coating are designed for multi-purpose training. The set includes 2- 2 lb weights, 2- 4 lb weights, 2- 6 lb weights and one rack. The dumbbells can be used for numerous exercies including tricep extensions, push ups, dips and lunges. The weights are made of cast iron. The neoprene coated helps protect floors and equipment. Ideal for home use.