Yeah, I tried to make a wrench like that this past weekend without heat. Had a vice grip and a rubber mallet... Needless to say, my wrench now no longer has the closed end on it. But it actually worked out okay.. It made the wrench short enough that I was able to get in under the doorhandle and tighten the screws. It took forever because each turn was probably 1/8th of a turn, but it finally got done...
