HeavyDuty Construction Solid wheels with double hard steel brackets provide durable, reliable support. Each wheel is rated to hold over 150 lb, making them suitable for heavyuse chairs and carts. Solid Polyurethane Wheels Wheels are made from quality solid polyurethane for mechanical strength, wear resistance, good shock absorption, and low noise during operation. Floor Safe and Quiet Rolls smoothly and quietly on hardwood, ceramic tile, wood, carpet, and cement floors without scratching. Note that the low rolling resistance can affect control, so use with appropriate care for safety. Easy Install and Universal Fit your old casters by pulling them out and pushing the wheels in. Universally fit for standard seats and mobile units such as work stools, office chairs, dining chairs, desk wheels, tool carts, and more. Use scenarios Office or home workspace: upgrade office chairs or drafting stools to enable easy, quiet movement across work surfaces without floor damage. Workshops and mobile carts: install on tool carts and workbenches to improve mobility and withstand frequent use in a or garage. Dining rooms and classrooms: enable smooth, floorfriendly mobility for dining chairs, classroom desks, or other furniture that moves between locations.