linkuk wrote:
"linkuk" wrote...
Any advice for what sort of drills to use for drilling old very tough
concrete. No holes will be less that 6 mm diameter.

I bought some from B&Q that were supposed to be for concrete but they were
a miserable failurs so were probably cheap and nasty ones.


Do you mean drill bits for your existing "conventional hammer"
drill? If so, then drill smaller diameter pilot holes (e.g. 5mm)
and then use the larger size. Don't push hard when using the
larger diameter.


Any advice would be great
I meant no hole will be GREATER than 10mm.

If you want to buy a drill just for drilling holes in masonry, that
you're going to use for more than the odd hole, but a cheap "SDS"
drill, and use virtually any brand/cost bit.