Also it has some fascinating history: > Joseph Buford Cox invented what is now known as the chipper type chain for chain saws. He based his design on the C-sha

Also it has some fascinating history: > Joseph Buford Cox invented what is now known as the chipper type chain for chain saws. He based his design on the C-shaped jaws of the larva of the timber beetle. > He only reached the fifth grade in his formal education. from https://en.wikipedia.org/wiki/Joseph_Buford_Cox https://en.wikipedia.org/wiki/Joseph_Buford_Cox If you think that sharpening is complicated now, think again, it must have been impossible before this guy.