favorite tool. i modified a crescent wrench so that it would open wider. i didn't wanna have to buy a longer wrench to get a wider grip. i removed the spiral gear, then remove the top part of the grip that moves. this top part has grooves in it. i just cut 2 more grooves in it, re-assembled. now it opens an extra inch! i love it b/c its rather small, compact, yet can tackle those large nuts/bolts.