Shelf rollers are a series of self-contained wheels mounted on axles, which are placed within shelving units to facilitate the movement of goods in and out of the shelves. By reducing the coefficient of friction by a factor of 7, they greatly diminish the amount of force needed to maneuver larger and more cumbersome products like dressers. These rollers can be installed in new racks or retrofitted into pre-existing ones, making them a versatile addition to any storage system.