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# Khoan cắt bê tông 101
The title is a joke.
But after digging a few holes on the wall, I think I should leave a few notes
for the future me.
- Be careful to choose countersink drill bit (aka mũi khoan).
- I pick **wood** type to drill on the wall, and ... it's broken :(
- Always wear gloves to protect your hand before touch the drill bit.
- It cut my hand :(