I love these files because they make cleanup quick and easy, clients see that there's no cross-contamination, and every client gets a new sharp file. The whole filing system is brilliant, but the 180 grit is my go-to for everyday filing and shaping. The only problem I occasionally have is that the edges of the abrasive are sometimes quite sharp, and if I'm not careful to place it a little to the inside of the edge of the file handle it can actually cut skin. I suspect they are stamped out from the back, and so the front edges turn up a bit. Other way around would make for a more comfortable edge against the skin, but regardless of the process I will never use another system.