I need to post 60 signs, mostly going onto wolmanized 4x4 or 4x6 signposts that have been outdoors for a few years. The sign holes are sized for #12 through 5/16 wood screws or lag bolts.
However I'll be running these down with a ratchet possibly with bit holder. No AC power for a drill. Don't have a cordless. Worried about splitting the 4x4s with these big screws.
Are there screws or lags of this size that can "self tap" into softwood?