Truthfully, there is nothing more frustrating than your couch sliding all over the place when you try to sit on it. I have searched high and low for some good casters and Amazon was definitely for the win. Either are very durable and protects my floor and keeps the furniture in place. You can use on other furniture, besides couches too. AmazonHomeFind AmazonMustFind AmazonHome AmazonFines AmazonAmazonHacks