HEAVY-DUTY CASTERS SET OF 4 - Our caster wheels are made from thickened stainless steel structure with double ball bearings design is extremely hard wearing and resistant to dirt, strong loading capacity is up to 2200lbs as a set of 4 caster wheels, each wheel can carry 550lbs, it’s good for transporting and displaying quietly and safely, SAVE YOUR BACK AND EFFORT. | MAX FLEXIBILITY & SMOOTH ROLLING - The 5 inch casters could rotate 360 degree which are good for transporting the mating equipment possible to any direction. The 4 casters are encase with superior non-marking polyurethane rubber for strong abrasion resistance, absorb shock and vibrations, wear-proof, no drag marks while rolling on all the floors. | DOUBLE SAFETY BRAKES - The 5 inch swivel caster wheels are all equipped with strong firm brakes, could locks both the wheel and the swivel simultaneously. When brake is pressed down, they can holding the equipment firmly lock it in place, the locking mechanism is easily engaged and released by hand or with your foot. | SAVING STRENGTH & WIDELY USED - Saving your energy by installing these caster wheels to move heavy objects in and out, you can maneuver around your furniture easily and effortlessly. The heavy duty casters can be used in both industrial and residential applications such as coffee table, trolley, cabinets, plant stands, bookshelves, shopping carts, display / exhibition equipment, dollies, mobile workstations, furniture and so on. | EASY INSTALLATION & FREE HARDWARE KIT - We offer two types of mounting screws kits for convenience attaching our caster wheels heavy duty to any surface, such as wood, steel, plastic. Includes: 16 x Pointed Screws (with 16 Washers) plus 1 x screwdriver , 16 x Flat hex bolts(with 16 Nuts) plus 1 x spanner.