Ran across an interesting wrench at one of my favorite tool sites – www.toolmonger.com. The manufacturer, Expedition Tools, claims that the wrench is the first and only hydrokinetically adjusted wrench that can cover a size from 1/4″ – 3/4″ (7-19mm). You adjust it by moving a piston. Because it contacts the bolt on 3 sides the manufacturer claims it’ll remove damaged nuts and bolts that other wrenches cannot remove. Cost is $25 on Amazon.com.