I have already bought them twice for my shop. The first batch was ok. Yes, just OK, but the price was right. This second batch was complete rubbish. Most wire bristles are uneven, causing wobble when in use. Many cup bodies are dented, which also causes wobbles. Many of them fell apart during use, almost causing injury. 3/10 were good, 7/10 had problems. I tried to contact the seller directly but their page was not found. Revain's return policy allows you to return only unused funds. No guarantee. Buyers beware, you get what you pay for.