The York 20kg Cast Iron Dumbbell Set includes 2 x 14” chrome spinlock dumbbell bars, 4 x chrome spinlock collars and 12 cast iron weight plates (4 x 0.5kg, 4 x 1.25kg, 4 x 2.5kg).. The dumbbell bars feature central knurling to ensure a secure and comfortable grip. The spinlock design makes plate changes quick and easy while the heavy duty spinlock collars safely secure the plates.. The set includes a handy workout guide and carry case for storage.