Yes, Yes, YES!!! You must pre-drill a hole in any concrete, mortar or similar application before installing these screws. Just be sure that you use the appropriately sized drill bit. And be sure the bit you use is a masonry bit as well.
A masonry bit is designed to draw the collateral material up and out of the hole being drilled. ---- Bill Gallik billgal...@centurytel.net - Why is it, whether you sit up or sit down, the result is the same? [Non-text portions of this message have been removed]
