It is pre-calibrated and use to make push-in f plunger connector for coaxial cable rg59 (4C) / rg6 (5C) Major application areas: video, satellite tv, cable tv, cat v, home theater, security and modems A professional grade compression crimping tool for coaxcial cables - widely used by cable tv technicians and other field engineers who do set up and installation of similar cables (RG6, RG59). Compatible connectors: it is compatible with almost all major connectors e.g. Ppc, digicon, gilbert, holland, thomas and betts, snap and seal, ultrease, stirling, lock and seal, etc Easy to use: insert the correct plunger into the tool's holder and insert the stripped cable into connector. Make sure the cable is inserted to end. Place the connector with cable into tool's holder. Squeeze handles and remove the crimped connector from the tool NOTE - THIS IS NOT FOR USED RCA / BNC CONECTOR TYPE