This set of dkn rubber hex dumbbells is comprised of 9 pairs of dumbbells weighing 5kg to 30kg suitable for use in domestic and light commercial environments the dumbbells have a hexagonal design which means they cannot roll away and the heads have a high grade rubber coating which increases their durability and reduces floor damage and noise when placing them down the handles are knurled to help with gripping the dumbbells and they are easy to clean