Casters, just stick them on! Casters with brakes, easy to use, with stoppers. Add-on wheels for carts and wagons. Strong double-sided tape and screws included. Weight capacity: 20kg. Adhesive feet for tables. Double-sided stickers, wheels, tape, and lock mechanism. (4 pieces [set of 4 (2 normal + 2 with brakes)]) ‐ Mercari: Shop from Japan