that's what I figured.This 3/8 lp chisel ps3 is a square tooth chain correct .Sorta getting back into this stuff ,just picked up a ms362 and a ms 261 got great deals on both . Home firewood for me these days ,my climbing days are over unless it is really necessary.Love this site ,it gets me feeling young again ,great stuff to read and nice people is what I have found so far . This wood cutting community I have always found to be very tight even in a competitive area like New Jersey.Thanks I'll keep trying to get better at sharpening this site has great ideas.