SCLAMPF / SCLAMPNF - EFX Negative and Positive Battery Clamp SCLAMPNF - EFX Battery Clamp Negative | SCLAMPNF - EFX Battery Clamp Positive SCLAMPNF: Fits Battery Negative (-) Terminal | (1) 0 AWG Output | (1) 4 AWG Output | (2) 8 AWG Output SCLAMPF: Fits Battery Positive (+) Terminal | (1) 0 AWG Output | (1) 4 AWG Output | (2) 8 AWG Output | 3 Digit LED Voltage Display