On Sun, 1 Sep 2013 08:16:24 -0700 (PDT), Jim K wrote:

On Sunday, September 1, 2013 3:25:12 PM UTC+1, PeterC wrote:
snip

Some of the reviews mention that the 'thread' in concrete won't survive many
removals/replacements, so I'd go for a longer screw for more insertion - er,
what's the subject? - for strength in the thread as well.

how many removal/replaces will screws holding battens under flooring have to endure?....

Jim K

One more than they'll withstand, of course.
--
Peter.
The gods will stay away
whilst religions hold sway