The york 20kg black cast iron dumbbell set are a great pair of dumbbells to have in any home gym as the sleek design helps to keep it looking tidy and professional york are a very recognisable brand in the fitness industry and all there equipment is reliable durable and high quality and they have done exactly the same with the york 20kg black cast iron dumbbell set the set comes complete with 4 x 0 5kg 1 25kg 2 5kg discs and 4 x spinlock collars to prevent the discs from slipping off t