HEAVY-DUTY BEARING: Thickened steel structures body, each caster can carry 300lbs, a total load capacity of 1200lbs(pack of 4), double ball bearing make it strong and durable
FLEXIBILITY & SAFETY: These swivel casters rotate 360 degrees which make turning the mating equipment possible. 4 wheels have brakes, dual locking, ensuring the safety of people and goods at any time and any angle
SMOOTH & SILENT: Made of non-marking polyurethane rubber, these caster wheels are very quiet and smooth while rolling, safe for all types of floor including wood floor
WIDELY USED: The 4 inch casters can be used indoor and outdoor, such as trolleys, workbench, toolboxes, light machinery, speakers, cabinets, stands, furniture, shelves, and other items commonly found in the workshop, garage, kitchen, and office. Free bolts, nuts and wrenches included with the package for easy installation