I was skeptical but they seem to require a lot less adjustment than the stock springs that came with my Creality Ender 3v2. I only needed 4 so I'm not sure what the value of 10 is. I would happily pay less for six fewer feathers. Maybe some customers buy them for multiple printers. In any case, if at some point in the rest of my life I need six very strong little orange screws, I'll be ready. I will update this review if that day ever comes.