I bought this to use with my second computer chair on carpet. I already owned one that I purchased from another retailer couple of years ago. The staples product is sturdy but not as much as the product that I am using. The staples product is OK for lighter chair and low carpet. It did not work for a slightly heavier chair. I could not roll the chair at all. Also it allowed for heavy press marks of the wheels. Staples advertised Free shipping but they charged $2.00 handling Fee. There is no packaging whatsoever. They left at the front door with lot of dust that we needed to clean up. Overall the product may be priced lower than similar products available elsewhere but so is the quality.