I'm trying to anchor a bench onto stone. Through holes I've drilled into my bench posts, and holes that I will have drilled into concrete, I plan to drive lag screws.
A fail-proof procedure calls for me to drill the lag screws. Unfortunately, I can't find the socket that would connect my drill and lag screw.
As an alternative to using a socket and drill, I plan to drive the lags using a spanner. A spanner would join the bench and stone less securely, but I'm concerned that the attachment won't be stable enough. Is my concern well founded?