THE LAST OFFICE CHAIR WHEELS YOU'LL NEED - Not all chair casters are created equal. Our heavy-duty casters are made from industrial-grade steel, precision ball bearings, and durable polyurethane wheels. The innovative design provides stability and balance, so you can focus on your work without worrying about wobbling or tipping over. DESK CHAIR MAT WILL NOT BE NEEDED ANYMORE – Our chair wheels replacement will NEVER scratch, smudge or damage your floors. Enjoy a carefree, safe glide across wood, hardwood, laminate, vinyl, tile and carpet floors all day long. P.S. Regarding the smooth rolling on carpet it depends on the pile carpet that you have, some roll better and some aren’t as smooth. High pile carpet usually rolls less smooth than low pile. REPLACEMENT FOR MOST OFFICE CHAIRS – Rest assured that our 3 inch office chair wheels are compatible with almost any rolling chair (please check the size of your wheel stubs before ordering). IMPORTANT: NOT compatible with IKEA chairs." (our stem size is 7/16" x 7/8") SMOOTH GLIDING IS AS QUIET AS A MOUSE – A squeaky, rickety rubber office chair wheel is a telltale sign that they’re cheap and poorly made. You’ll slide and glide around in total silence with our swivel casters. RELIABLE HEAVY-DUTY CASTERS – This unique designed office chair wheels are made of high-strength materials, has well stability and durability, can max load 650 pounds. These wheels for office chair can easily cope with various usage scenarios, providing reliable mobility protection for your office and life. The Lifelong Wheels stem chair casters are guaranteed to protect your floors from scratches and marks on any surface. This includes hardwood floor, tile, laminate, carpet,mats, concrete, stone, vinyl, etc. Effortless and Whisper-Quiet Rolling Stay focused on your task instead of distracted and annoyed by the squeaking and sticking of cheap plastic or metal office chair casters.Get rid of being tied down to your office chair mat.