For many years the Marson HP-2 Rivet Gun has been known and trusted for its durability, quality and performance so it comes as no surprise that it is also the highest selling hand rivet tool in the industry. Often copied but never duplicated; the 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 include: precision die cast, high strength aluminum alloy body; drop forged carbon steel upper handle; and thick cushion-molded vinyl grips for comfort. The HP-2 sets up to 3/16 in. steel rivets and comes with four mounted nosepieces (3/32 in., 1/8 in., 5/32 in., and 3/16 in.) and a service wrench.