Review on 12-Pack GoodtoU Black Glass Diamond Dresser Knobs - 30Mm Black Drawer Knobs For Girls' Room, Cabinets, Drawers, Dressers And Cupboards - Clear Black Knobs With Enhanced SEO (Black) by James Cowan

Typical Chinese made junk. It's a good thing that I ordered these knobs as a 25-piece set. I needed 8 and it took 11 to do it. 3 of the first 11 knobs in the package were defective. One had sharp metal filings (strips) around the shaft. Guaranteed to cut up someone's fingers. The second one didn't have the threads tapped all the way and the included screws were too long to compensate. The third knob's threads stripped while finger tightening. The included screws are pretty long, even for use on drawers where the wood is fairly thick although they installed on the drawers (except for the defective ones). My bathroom vanity's doors were too thin for the screws. I ended up using a half dozen washers to shorten the exposed threads. The included screws are metric, M4-0.7x25mm.If you don't already have a nice collection of M4-0.7 metric cabinet knob screws of various lengths on hand (yes, that's a thing and I don't have a set), you may end up spending almost as much for screws in a set as you paid for these knobs. Checking to be sure the knobs you buy have S.A.E. threads might be a better idea. I should have done so.I haven't checked the rest of the knobs yet, but so far they have about a 28% failure rate.