Build muscle and get toned with the US Weight 54 lb. Aerobic Weight Set. This set includes a 3pc bar, (2) spring collars, (2) 5KG weights, (4) 2.5KG weights, & (2) 1.25 KG weights. The heavy-duty bar features foam, to act as a cushion on the hands and neck when lifting and squatting the weight set. Mix up your workout routine by using each weight plate as a dumbbell, holding onto the handles of each plate. Each weight plate includes scalloped edges around the handles to make gripping easy and more comfortable..