Good luck with keeping the backs on
I did like these little studs but I was skeptical about the backs.  Turns out I had good reason, I lost the 3mm stud and back along with the 4mm stud and back two times. By some miracle I found the 4mm and back in the bathtub.  Now I have lost the back to the other 4mm stud.  The backs are little pieces of plastic that seem to loosen easily, they are clear and impossible to find.  For this reason I would not recommend to a friend.
Rating: 1 stars