SummaryThis is a replacement bracket for a Garmin Nuvi 255. The bracket attaches to the ball end of the windshield mount. It then holds the Garmin in place.InstructionsThree components are are required and need to be printed. Two of the components form the "arms" of the bracket. The "arms" are the components that actually touch and hold the gps unit. The arms are fit and slid onto the ends of the large main bracket. When I printed these I had touble getting the fit just right, so some trimming was required. Support arms 2 worked better for me. After dry fitting, the arms can be glued or welded in place. Mine fit tight enough as-is...