Rotation: These small furniture casters can be rotated so you can easily move items in any direction you want. If you want to fix the wheel in one place, just press the brake and you can fix it in 5 seconds. Premium Material: Heavy-duty casters with premium thermoplastic rubber () brakes provide the springiness of rubber wheels with the strength and durability of metal wheels. Works on all types of floors, leaves no marks and well. Product parameters: wheel diameter 50mm; height: 64mm;package content: 4 rubber wheels with brakes, 16 screws. 4 brakes can provide more stability for objects, not easy to move. These wheels for transport can be used for a of small or projects, suitable for heavy duty coffee tables, plant stands, bookcases, shoe cabinets, toy boxes and more. Material: Color as shown Package Contents: 4 x Furniture Castors 16 x screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.