The 30-587 is a RG-58/RG-174/RG-8218 Die Set with Crimpmaster™ crimp tool frame 30-506 for 50 and 75Ω cables. Hex hole sizes of 0.213, 0.178, 0.068 and 0.042-inch. Provides good and consistent crimp every time. Interchangeable dies provide versatility in a single tool.