The Marson HP-2 is the largest selling hand rivet tool in the industry. Known and trusted for durability, quality and performance, this Marson rivet tool is often copied but never equaled. It's square shoulder fulcrum pin of cold-formed heat treated steel prevents pin rotation that can elongate the engaging holes and cause premature tool failure in imitation tools. Other quality features of this hand rivet gun include: precision die cast, high strength aluminum alloy body; drop forged carbon steel upper handle; and thick cushion-molded vinyl grips for comfort. The Marson 39000 sets up to 3/16" steel rivets and comes with four mounted nosepieces (3/32", 1/8", 5/32", and 3/16") and a service wrench. Weight 1 lb. 3 oz. .