Gripnail has been manufacturing sheet metal equipment for over 40 years. In 1971 we introduced the Gripnail multihead Pinner which was the first bowl-fed sheet metal equipment for automatically applying duct liner fasteners. Throughout the 1970s and 1980s we introduced single head and multiple head sheet metal equipment for insulation fastening and in the 1990s expanded our sheet metal equipment to include a full line of welders including our high speed Power Pinner 50. We also modify our sheet metal equipment for specific applications and we would be happy to review your requirements.