I built my coop last spring around this time and did so with mostly nails(about halfway through we switched to phillipshead screws). I just built a smaller coop and used hex head screws. OMG...... I may just have to tear my big oune down and build it again they were such a pleasure to use. I bet I rounded out a quarter of the phillips-heads. Out of probably 50 screws in this new coop, I rounded out a grand total of 1... Do yourself a favor and use them!!!