iNVUS FasterCasters - Rollerblade Style Office Chair Wheels - Built Tough To Last A Lifetime - Ideal for Hardwood Floors - Perfect Upgrade - Set of 5 PROBLEM SOLVED! The problem with other rollerblade casters is they lack horizontal strength and eventually bend or break. Our latest product solves that problem! How? iNVUS FasterCasters now have DOUBLE STRENGTH hardened and tempered steel frames, reinforced stems, a heavy duty 650lb load capacity per set and more than DOUBLE the horizontal strength of most competitors - which means that bending or breaking wheels are now a thing of the past. Never suffer from bent or broken wheels again! BEST OUT THERE - Miriam, an Amazon Customer, said this about our FasterCaster Chair Wheels , OMG THESE ARE THE BEST WHEELS EVER. THEY'RE THE ABSOLUTE BEST. SERIOUSLY. DIDNT KNOW HOW EASY INSTALLATION WAS LOL. YOU JUST PULL THE OLD ONES OUT AND PUSH THESE RIGHT IN. AND OMG. WHEN YOU SLIDE ON THE CHAIR. IT FEELS SO SMOOTH , "IF I COULD GIVE 10 STARS I DEFINITELY WOULD". Get Yours Today While Supplies Last. STOP DAMAGING YOUR WOOD FLOOR - Avoid costly repairs and enjoy the peace of mind of our slip-free, non-marking and non-scratching polyurethane rubber wheels. Many hard plastic wheels use low quality materials that can permanently scratch hardwood floors. Our wheels are made from high quality soft polyurethane - smooth, silent and guaranteed not to scratch or mark any surface. The perfect replacement wheel set for your computer desk chair - and just ideal for Hardwood Floors. EASY INSTALLATION - Youll be SETUP IN SECONDS - Our standard sizing fits 99% of chairs sold in USA (7/16" wide x 7/8" tall) or (11mm x 22mm). With our simple push-in installation, youll be ready to go in seconds - simply pull out the old caster and push in the new one - its that easy! NO RISK, 100% MONEY-BACK GUARANTEE! Does this come with a money back guarantee? YES! Your purchase comes with a full 90 day no-risk, no-nonsense 100% money back Guarantee. Either youre thrilled, or we dont want your money! See why Amazon customers rate our Caster Wheels 5-Stars.