Set of 6 Dragonfire Heavy Duty casters for the, or the . Each caster is a 4 bolt plate caster. The 4 swivel locking casters go on the corners and 2 non-locking swivels on the center. All casters have grease fittings for maintenance. Box also includes all mounting hardware including 24 M-10 Bolts, lock washers and regular washers.