Used to improve drilling small holes in a metal insulating cup. The mug absorbed water into the heat-insulating layer every time it was washed, and the water did not flow out. I couldn't drill through the metal with conventional drill bits. With these titanium drill bits I was able to easily drill a small hole to allow air in on one side and water out on the other.
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Impact screwdriver Makita TD0101F, 230 W
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Bit and socket set BOSCH Promoline (2.607.017.322), 26 pcs.
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𧱠Bosch 2607017164 Piece Setter Masonry: Advanced Tools for Precision Masonry Work
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