We NEVER use a nail in building picnic tables because nails eventually ALWAYS seem to back out. It may seem a bit more convenient to just hammer 'em together but deck screws are SO much better (unless one has absolutely no choice) -- and that comes from people who own an air nailer. All it takes to use deck screws is to pick up a box while getting the lumber, along with a matching driver bit -- then nearly any drill will drive them home and they will stay home. We use cordless drills but nearly any drill will do for building one or a few tables. Another advantage in using screws for your first table is that getting something out of place is not a catastrophe (and you donât have to destroy things to get them apart). Just back out the screws and move parts as necessary. We recommend DeckMate screws, not because we have stock in the company, but because they are much less prone to break off under torque or for the heads to strip out when driving in or backing out than are similar-appearing deck screws. The same applies when we build a deck (or, hehehehe, a napkin holder). We are sold on screws over nails except in framing and a few other applications. Also: For anyone wondering, âWhat should I charge if I make a table to sell?â, there is a discussion of that topic in the âPlans on the wayâ thread.