The DeWalt NA187629 Nailer Driver SA is a replacement component designed for compatible DeWalt nailer models. The driver mechanism transfers force to the nail during operation, helping drive fasteners into the work material. It works as part of the nailer’s internal driving system to support consistent fastening performance. Replacing a worn or damaged driver can help restore proper t... https://www.wholetoolbox.com/dewalt-na187629-nailer-driver-sa/NA187629.html