These 8-inch by 2-inch swivel casters are built for scaffolding, flight cases, and heavy equipment stands that need to roll on demand and lock down solid when it's time to work. The top plate spins a full 360 degrees on premium steel balls for easy repositioning, and the non-marking rubber tread absorbs shock and vibration so loads move smoothly without scuffing floors. A double lock mechanism secures both the wheel and the swivel action at the same time, which matters when you're working off a rolling platform and need it to stay still. Each caster in the set of four is rated for 1100 lbs, giving the group a combined capacity well suited to display equipment, light machinery, cabinets, and equipment stands. The 5mm galvanized steel plate resists rust and wear, and at 21.82 kg per set the casters are heavy-duty enough for daily use in a warehouse, stage, or workshop setting.