INSTANT MOBILITY: Four-pack of threaded casters wheels with wide non-marring thermoplastic rubber wheels (3” height x 13/16” thickness) that quickly attach to small and medium sized utility carts, barbeque grills, shelving units, and other items commonly found in workshops, garages, kitchens, and offices. | 150 LB LOAD CAPACITY PER WHEEL. Each caster supports 150 lbs. of load (with a 600 lb. total capacity for all four wheels). Two of the casters have brakes while all four swivel 360-degree pivoting action for smooth wheeling on hard, smooth surfaces such as concrete with very low dragging. Double lock mechanism of both swivel and wheel rotation ensures stability. | QUIET MOVEMENT ON HARD SURFACES: A solid solution for easily positioning your steel stand to any desired area.Withstands rigorous use in warehouses, shops, restaurants, schools, and hospitals. Really helps moving it without inducing vibration, rattling, squeaking, and other hazards and annoyances. | DOUBLE LOCK MECHANISM: The swivel dual lock caster kit is the perfect solution for easily positioning your steel stand to any desired area in your shop. Double lock mechanism locks both the wheel and the swivel bearing at the same time, which is essential for safety. Each set includes four locking nuts. | MULTITUDE OF USES: Houseables' caster wheels can be placed on work benches, instrument cases, art tables, and so much more. Whatever your workplace needs assistance making mobile, our caster wheels are a quick fix.