Floor Protection --- The office chair wheels are made of rubber and nylon, which helps prevent scratches and damage to your hardwood. Heavy Duty --- Swivel casters are 360 degree rotatable and provide you with a smooth and quiet ride, 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 floors and vinyl planks, leaving no scratches or marks on floors. Standard Size --- The chair casters come with standard stem (10mm X 22mm) suitable most office chairs and other furniture, easy installation easy and perfect for home or office use.