Cheapo Titan/Erbauer SDS will make drilling through that stuff super easy for fifty quid. Only reason I wouldn't get one is if you're short if storage space.
I have the cheapo 850w version from french B&Q, and it has destroyed all that it has been in front of it.
@lynx started
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Cheapo Titan/Erbauer SDS will make drilling through that stuff super easy for fifty quid. Only reason I wouldn't get one is if you're short if storage space.