On May 24, 1:55*pm, Steve Firth wrote:
Peter Percival wrote:
Rick Hughes wrote:

[snip]

you could use resin fixings, no risk of cracking concrete and hole is
fully filled

Excuse my ignorance, but I've never heard of resin fixings.

You drill a hole, inject a liquid resin and hardener then insert a threaded
rod and wait for the resin to harden before using the rod to bolt down the
attachment.

Another method is to use non-expanding masonry screws. These need an exact
hole drilling so you need an SDS drill and the appropriate bit.

SDS for 6mm holes? nah ordinary hammer drill will suffice

Jim K