One of the hardest things to do must be to throw a worn out file away. A friend mine years ago could not get his Zwickeys sharp. His file was quite possibly a third or fourth generation heirloom. I could almost see the reflections of numerous long passed ancestors reflecting from it. I demonstrated by sharpening one, I told him to go buy a new file and when you get them sharp like this one you can hunt with them. A couple of weeks later, they wanted help finding a deer. I looked at his arrows, the sharp one was still in there, along with some butter knife dull ones and those looked like they had been shot into a bale. In his pick-up was that old file. Some people just don't get it, he now hunts with cps and presharpened heads and still thinks those four blade Zwickey Escimos don't work. I get a new file every year, it just makes life easier.