These wheels and casters can handle a lot of weight. They're easy to install, just turn the brake on and off, and best of all, they make life easier! The wheels are rubber and roll beautifully over carpets and hardwood floors without scratching them. I'm getting too old to move heavy furniture. So far I have attached these wheels to two of my dining cages and a storage bench. I love them so much I'm ordering extra for my sofa and chair! No more back pain and no need to rely on others when moving furniture. Wheels are the answer! You won't regret getting them - they're a real lifesaver!