Floor Protection --- The office chair wheels are made of rubber and nylon, which helps prevent scratches and damage to your hardwood. Heavy Duty --- The swivel casters are 360 degree rotatable and provide you with a smooth and quiet rolling, can hold a maximum total weight of 300 lbs of chair and rider, the best replacement wheel for your desk or office furniture. Easy to Install --- No tools required, simply remove your current casters and push our replacement chair wheels into the socket. Application --- Our office chair casters are suitable for all floors, including laminate, hardwood, carpet, tile, bamboo flooring, and vinyl plank, leaving no scratches or marks on floors. Standard Size --- The chair casters feature a standard stem (11mm X 22mm) that fits most office chairs and other furniture, easy installation and perfect for use at home or in the office.