Stanley fatmax heavy duty stapler nailer stanley 6 tr350 the stanley sta6 tr 350 heavy duty stapler nailer with robust steel construction for a longer working life also comes with easy squeeze for easy actuation and an anti jam feature li the sta6 tr 350 also has the following technical specifications li fires heavy duty type g staples li fires 1 swkbn 18 gauge brads stanley 6 tr350 fatmax heavy duty stapler nailer