I started using pneumatic finish nailers ten years ago, to help speed up production and do a better job on the larger projects we'd started taking on. Now I use them for everything, from hanging and casing doors to applying exterior trim. I keep three compressors and seven nailers going every day, and I have carpenters on my crews who have grown so accustomed to using them that they might not know what to do with a hammer and finish nail. The decision to invest in a pneumatic nailing system shouldn't be taken lightly. In addition to the nailer, which costs between $300 and $600, you'll have to buy a lot of support equipment at startup — compressor, hoses,