I am using Tap cons to hang furring strips in my basement to get ready to hang my drywall. Well what I thought wouldn't be that big a job has turned out to be quite the little chore. The Tap cons work greeat, its just drilling the pilot holes I wasn't ready for. If you are going to be drilling a lot of holes make sure to double up on drill bits. The expensive ones don't last much longer than the cheaper ones. I have just begun and have drilled about 30-35 pilot holes and am on my 4th drill bit. The small diameter bits just can't take the pounding that a larger one can. I am drilling into regular 8 inch concrete block. Anyway, thought I would pass my experience along so that others can try and prepare ahead of time. Maybe 10 pilot holes per bit is average, but to me it seems a bit low before the bit dulls (or breaks).