On 11/04/04 23:10 ET, AVXpressions said...
I'd have to go with the blue screws. For the life
of me I can't remember what they are called
either.
BUT if your drill wobbles on these, they will also lose effectiveness. They have low and high threads, and they depend on the high threads cutting into the masonry and providing powder, plus a tiny depth of thread, to hold the screw in place.
This is NOT my choice where the weight is in the direction of pulling out the screw, though! There I would use, I believe it is called, a Red Head. There are many models of Red Heads, but the ones I am talking about have a sleeve expands as the bolt is drawn tight, meaning that pull-out will TIGHTEN them. Since the holes for these are generally 1/2" or larger, there are no issues with drills wobbling. A bent 1/2" drill will not wobble, it will break your arm. So no problem.