1. Upgraded Plastic Cat Wheels: Upgraded plastic cat wheel, no tools needed, quick installation in ten minutes. Most pet cats are overweight because they spend long hours indoors and lack exercise. Cat Exercise Wheel for Indoor Cat running is the way to exercise, help your cat stay physically active and reduce boredom 2. Upgraded Silent Wheels Builtin Security Lock: Cat wheels for indoor cats upgraded silent rollers, silent when running. Even if the cat uses the cat treadmill at night, the cat wheel will not affect the owner's sleep. Our cat exercise wheel has a builtin locking mechanism, cat play time can be controlled. The cat wheel can also be locked when no one is home to avoid accidents when the cat is left unattended 3.Smaller Gap Between Runway And Base To Prevent Cats From Pinching Their Feet: We have ly upgraded the cat exercise wheel to further reduce the distance between the base and the running wheel, which can effectively prevent injuries caused by cats pinching their feet when getting on and off the cat treadmill. The corners of the cat running wheel are polished round to prevent cuts and protect your cat in all aspects 4.Large Weight Capacity Reinforced Base Sturdy and Stable: We have weighted and reinforced the base, which is very strong and sturdy. The maximum weight capacity of the cat wheel is 70 pounds, no need to worry about the weight of the cat at all. The base of this cat exercise wheel is widened and completely wraps around the running wheel, very stable, no need to worry about tipping over