The 30-576 is a die set designed for use with the Crimpmasterâ„¢ Crimp Tool Frame (30-506). It features three hex hole sizes for precise termination: .178 in. (4.52mm), .128 in. (3.25mm), and .068 in. (1.73mm). These dies are engineered to provide a good and consistent crimp every time and can be changed quickly and easily with a screwdriver. This interchangeability offers versatility in a single tool, making it ideal for applications involving RG-174 and Mini-59 BNC/TNC coaxial connectors.