Nine-sided wrenches may be beyond the reach of science, but what about one-sided wrenches? They does exist, sort of. They only work because of the hook at the end, which catches on grooves in certain kinds of plumbing slip nuts and vise screws.
Location: Box 25
Have you used this tool? Think my description is all wrong? Have a better example? Comment now with any thoughts you have about this tool!
