Pack of 4 universal caster wheels is a perfect solution for your needs; you can use them with any work benches, tools cases, furniture and so on Each caster wheel is made of high quality steel, providing impressive load capacity and has strong bearing for quiet and smooth rolling Highly maneuverable wheels have swivel function for easier use – roll anywhere you want and lock them with integrated double lock to prevent both rolling and swiveling for maximum safety Rubber wheels provide smooth and easy movement on any surface with no marks; moreover this type of wheels perfectly absorbs vibrations; plastic shield covers the wheel and gives an aesthetic look Multipurpose 3.95-inch size of the wheels with a 0.47” (M12) threaded stem can be attached to any desk, cart or a mobile TV stand; these locking caster wheels can be a perfect replacement for standard wheels of TV carts by ONKRON, including models TS1551, TS1881, TS2771 and many others