This heavy duty set includes 6 pairs of dkn dumbbells and a sturdy dkn 6 pairs a frame dumbbell rack for easy storage the dumbbells are designed for strength building and muscle toning and have a tough and durable construction as well as chrome plated ergonomically shaped knurled handles for a firm and comfortable grip they feature an anti roll safety design and pinned cast iron heads encased in rubber for extra durability and protection the 2 sided dkn a frame rack offers a solid steel cons