This set of four Plastic Hood Caster Wheels will add ease of mobility to your H-Rack. They are easily installed and immediately turns your stationary H-Rack into a rolling fixture. Worried about the rack accidentally moving during store hours? Don’t. Two of the wheels are easily locked when the rack is where you want it. These are a great add-on for when you want to re-arrange your store but don’t have a lot of time.