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If u want to drill big holes quick u have to clamp the base u can overpower the magnet.
Then there is drill bits.
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When u start getting into bigger holes say north of 1/2 in chrome bits in my humble opinion do not hold a candle to black bits. Black bits r not as brittle and don't heat up. These r Harbor Freight and they r very good bits. I just drilled 10 7/8 holes in 1/2 in steel with one and it's still a good bit.
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I can't get away from the thought of using these is some of my scrap metal sculpture. Maybe snakes for a Madusa.
Wadaya think?!
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