HIGH QUALITY DUAL LOCKING - Soft polyurethane caster won't mark the floor or chew up the carpet. Double lock mechanism locks both the caster and the swivel bearing at the same time, which is essential for safety.
Good Wear Resistance: Swivel casters rotate 360 degrees which makes turning the mating equipment possible, maximum load 600 lbs capacity for the pack of 4, bearing heavy duty
Heavy Duty - 75 lbs. per dry caster, 300 lbs. for a set of 4. Commonly used for shopping carts, carts, office chairs, cabinets, bookshelves, workbenches, under-bed storage, stands, moveable furniture, etc.