Chris Hodges wrote:
before I got the SDS I was getting through 6mm bits pretty quickly -
bought a B+D "pyranha" (IIRC) bit which was quicker and lasted much
better - still got it but it's getting a bit blunt now.

Is that the thing with a tit on the end, like a "bullet"
drill bit? Just sharpen it. Blunt masonry bits are a real
PITA.