1" wrench - 12 pt - cut out for use on beer tower. best $11 i ever spent on beer equipment after struggling with everything from spanner wrenches to the cheap micromatic, etc. wrenches and needlenose pliars
cutout 3-4 "teeth" of the 12 pt and works great. seconds to get off taps from tower when they are jammed in there (2-3 taps)
