PERFECT REPLACEMENT OF FLOOR MATS: UNIQ Rollerblade Wheels are the perfect floor protectors for office chairs. It eliminates the need for office chair mat for hardwood floor. The UNIQ protector castor replacement wheels are made from protective nylon rubber and encased in soft polyurethane material, so they will not leave any marks or scratches. As a result, our low profile heavy duty caster wheels are ideal for all surfaces, including hard wood floors, tile, vinyl or carpets! BOOST YOUR PRODUCTIVITY WITH OUR ULTRA-SMOOTH OFFICE CHAIR WHEELS! Now you can alleviate physical stress on your joints, enjoy smooth rolling and keep noise to a minimum with the UNIQ premium roller blade caster wheels for office desk chairs! The patented silent design combined with the innovative rollerblade style will allow you to focus on your work without any distractions! WANT TO UPGRADE YOUR COMPUTER OR GAMING CHAIR? The UNIQ patented design features a new reinforced swivel vertical axle with dual oil proof ball bearings for a stronger connection. In addition, our universal workbench chair castors will facilitate feather-light gliding and give your boring furniture a stunning industrial style makeover! Are you ready?