This set of wood-wheeled casters was designed to support a lot of weight. Some might say they could be classified as bed casters. The 1 1/2 inch wheels are made of dense wood and are 7/8 inch wide. The wheel, in turn, is attached to a cast-iron holder and a heavy thick stem. The stem that inserts into the leg is 2 1/4 inches long and 3/8 inch thick at the base. The stem is too thick to fit most leg sockets or sleeves. These casters would stay in place by the weight of the piece of furniture. The lift to the piece of furniture after inserting the casters is about 1 5/8 inches. This hard-to-find set is free moving and ready to be used.