Marson 39000 RIVETER HP2 C This is the largest selling hand rivet tool in the industry. Known and trusted for durability, quality, and performance, this tool is often copied but never equaled. The HP-2'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 include: precision die-cast, high-strength aluminum alloy body; drop-forged carbon steel upper handle; and thick, custom-molded.