The two piece piano dolly is designed to move a variety of heavy objects such as pianos, boilers, soda machines, etc. It includes 2 straps that tie the two hand carts together and the adjustable straps lock around product securely. The retractable wheels allow instruments to rest on own weight while in transit to avoid skidding or rolling. The rubber and felt cushioning provide complete protection at contact points. There is a 1000 lb. load capacity per set.