On Jul 1, 12:49 am, "John Gilmer" wrote:
If you're driving Tapcons with a hammer drill, that might be why you
haven't had much success with them. Try an impact driver.

I don't have the box in front of me, but I seem to remember that the
instructions said: "Hammer Drill."

The "kit" they sell is designed to use the same drill for drilling and
driving.

A hammer drill to drill the hole, and an impact driver to drive the
the Tapcons. Very different tools.

R