These are great quality even if I am clueless on how to use it properly.
Apparently, this is for eyebrow mapping. It also mentioned permanent makeup (tattooing). So the pencils are supposed to be very temporary as they are merely there to sketch out what will be taken care of in the next steps.
I cannot attest for how well it works on me personally because I am not gifted with enough skill to do this myself. But they are good quality, that's easy to see.