【THE STRENGTH YOU NEED】The 6 inch heavy duty industrial casters set of 4 were designed with strength and sturdiness in mind for a long lifespan and easy movement of large, heavy loads. Each caster holds up to a maximum of 1200 lbs. or 4800 lbs when purchasing a set of 4 casters. 【EXCEPTIONAL QUALITY】 Nefish heavy duty industial casters are made with a high quality, sturdy material allowing you to move heavy loads with ease and safety. These casters feature red polyurethane material on a cast iron core for a long lifespan, and to keep all floors clean and free of tread marks. Its polyurethane material and cast iron core also allow it to resist against most chemicals, oils, grease, and water making this caster ideal for a multitude of industrial applications. 【Ergonomic polyurethane on steel casters】 The incredible durability and ergonomic benefits of this type of caster set of 4. The wheels have large diameter precision ball bearings in the wheel to allow very easy rolling, the round tread allows the wheels to swivel easily under load and roll making them ergonomic for many applications in warehouses and production areas. 【Double Ball Raceways】The Nefish top plate swivel casters with brake feature double ball raceways for added load capacity and durability make the casters low frictional resistance and high speed limit, easier to move. Plus 360 degree rotation top plate, a little strength can easily transform any direction that you want. 【MULTIPLE USE】 These heavy duty plate caster wheels are ideal for a huge variety of uses DIY to industrial applications workbench, trailer, workshop, shop cabinet, toolbox, scaffold, desk, Shelves, Pallet rack, Portable flatbed, manufacturing stand, rolling box storage, heavy machine shop utility tools. It is easy to see why using casters to help move an piece of furniture or machinery will help to make the task easier and more efficient, but have you thought that your choice of casters can actually make a difference in how efficiently you can move these things around? Nefish has been in the business of quality casters and material handling equipment since many year and can help you choose the right casters for the job you need to do. We are confident that we can help you find the right type of caster at a price that is affordable. This swivel Nefish 6"x2" polyurethane-on-iron wheel plate caster with positive locking side brake (protected within leg and featuring thermoplastic brake grip) is ideal for applications where floor protection and the greatest load capacity and durability is required. These polyurethane wheels are tough, smooth rolling (standard with roller bearings), and highly resistant to chemicals and oils. The polyurethane (95 Shore A) is chemically bonded to the core to prevent tread separation. This popular line is competitively priced and features: 1/4" thick steel construction, 3-7/8"x4-1/2" top plate, dual ball bearing raceways, welded legs for strength, grease zerks in axle and raceway, RoHS compliant zinc plating for corrosion resistance, and a one-year warranty.