Whats the best way to drill a 6" whole in my wall?
I'm doing a 24" 52mm dia hole with a just bought diamond core bit
from Screwyou. Had a go but it seems slow - but it is limestone which
seems harder than anything, harder than granite?
Any tips on using it? Presumably not sds rotary/hammer but rotary
only? Fast or slow? Pre drill with long bit?
cheers
Jacob
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