I am posting this here because I used it (well, tried to) to remove the STUBBORN door latch bolts. This is the one I purchased: http://www.zorotools.com/g/00057710/k-G1106621/ I know this will be a stupid question, but I don't know if it didn't work because I was not using it correctly. It has a "collar" that can be turned slightly clockwise and counter-clockwise, and I imagine that determines the direction of the "torque" the tool transmits to the bolt. I turned it to the direction that gave me counter-clockwise turning when I struck the tool, but the bolt never even moved! I ended up heating the crap out of the bolts with a propane torch and removed them with a Phillips bit on a socket wrench, but would like to know how this tool works for the future. Any advice/input would be greatly appreciated!