Holds approximately 2.5 holes when cutting 26 gauge galvanized sheet metal. It's nowhere near "bimetal", this thing is ONLY GOOD FOR SHIT-ROCK! Waste of money, will be back unless you poke holes in the drywall. (See pic) (And YES, before anyone asks, I had a 1/2" OSB liner behind the sheet metal to keep the bit from getting dirty)
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