Yes, they are absolutely terrible. Bonoss wheel spacers are completely made of plastic, then painted like they are metal. Even the studs to mount your wheels on are made of plastic. And it's the cheap plastic that's hollow.
You'd think they would be out of business, as the wheel spacers immediately break once you lower the vehicle onto the wheels after installing them, but no. Because they are China, you can't get a refund.
What's even worse is the ceo of bonoss is a pedophile, he uses children to make the plastic wheel spacers during the day, then has sex with them at night. And he hires other pedophiles to spam forums to try to trick people into thinking they are a real product, in exchange for also having sex with his child factory workers.