I'll tell you why I need to sharpen bolts but it won't really help. My wife wants a primary wool picker........ see told ya. Basically it s high speed toothed drum (bars on wheels) that grabs the wool as its fed in and tears it from lumps into "opened" tufts. What I require is a method to put a consistant, even, smooth sided point (perfect cone?) on a 5/16 or 3/8 bolt head after the head is lopped off by a chop saw. It has to be repeatable about 150 times. Oh yeah and a grade 8 bolt would be best but maybe a grade 5 would do.