about this project High-quality material: metal parts are made of high-quality solid steel, and the wheels are made of thick and strong PVC. Plate casters of this material can be used on wooden floors, concrete floors, carpets, smooth brick surfaces, etc. Smooth and Quiet: These swivel casters are smooth and quiet even under heavy loads, thanks to dual precision ball bearings that facilitate smooth movement and low noise during motion. The PVC material will also absorb shock for low vibration transport. Easy Steering: Equipped with a 360-degree swivel head, the casters respond instantly to changes in direction. These 2-inch plate casters swivel on ball bearings to keep the wheels turning even under heavy loads. It allows you to work in tight spaces or other environments that require greater mobility. Widely Used: Can be used in both industrial and residential applications for shopping carts, trolleys, plant stands, workbenches, bookshelves, under bed storage and more.