nah, it feels rough when i have a poke around so i think it's concrete
i had the smae problem in my last flat, i think lintels hate me
( Naked Ape call me Caitlyn, Mon 16 Apr 2012, 9:56, 2 replies, latest was 12 years ago)

If your masonry bit got hot and blunt
then it's not concrete. Masonry bits are designed to cut through concrete and brick. That's kind of their raison d'etre.

Usually I wouldn't point out the blindingly obvious, but you know. Situations etc.
( Kroney, Mon 16 Apr 2012, 9:58, Reply)

nah, it could be
There was a habit a while back of putting shed loads of pebbles in the concrete for lintels. My old place darn sarf was like that. Only an SDS drill will touch that kind of shit, you need the extra hammer action to shatter the pebbles. Matron.
( the mighty badger Aphrodite, on a bar stool, by your side, Mon 16 Apr 2012, 10:01, Reply)

He should have read this.
www.wikihow.com/Drill-Into-Concrete
(Bazongaloid, Mon 16 Apr 2012, 10:03, Reply)

Hahaha
You could hang a killer blind with that thing.
( Kroney, Mon 16 Apr 2012, 10:04, Reply)

you could hang Barry White with that thing.

Edit - It's monday, and so my humour glands are off-kilter - can we just pretend that I did the following?

blind whale?
( the mighty badger Aphrodite, on a bar stool, by your side, Mon 16 Apr 2012, 10:11, Reply)

if it's concrete with pebbles in
you'll need an SDS drill.
( the mighty badger Aphrodite, on a bar stool, by your side, Mon 16 Apr 2012, 9:59, Reply)