... which punches into the distinguished cable by the energy of power burning.It will cause the phase to earth short-circuit ... and give further judgement.It owns multi-function,big power and reliable,remote-control,safe,simple structures,light weight,good ... ,S3 red for nail-slugs,different functions φ8.6mm shooting gun,DD27~DD72 nail-slug can prick 100mm cables Working power: DC ...