My vote is for the Rotozip, what a cool tool. When I installed the wood burning stove last year it made cutting a circular hole in the sideing a breeze. I've used it with a metal cutting head to cut off bolts that were longer than I wanted. Great all around tool that should be in everyone's garage.

JHAP
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"My mind is a raging torrent, flooded with rivulets of thought cascading into a waterfall of creative alternatives."
...Hedley Lamarr (that's Hedley not Hedy)