The DKN Olympic Chrome dumbbell bars with collars are suitable for use with 2" (5cm) Olympic weight plates and are strong and durable thanks to their solid steel construction and chrome finish. The handles are knurled for a more secure grip when working out and the included spring collars ensure support and that plates are safety fixed in place. The dumbell bars are supplied as a pair and weigh 7.5kg (16.5lbs) each.