I recently purchased a set of casters for my workplace, and I must say that they are the perfect fit for our material handling needs. According to my experience, these industrial and scientific casters are top-of-the-line when it comes to performance and durability. The non-marking thermoplastic material ensures that our floors remain unscathed, while the smooth swivel and locking mechanism makes transporting heavy items a breeze. The only downside is that these casters are a bit pricier than some of the other options on the market, but in my opinion, the investment is well worth it.