GFS series is non-conductive staff, because of fiberglass.
GFS-1010
GFS-55
∗ Tip of the top section includes a 5/8 × 11 female threaded hole suitable for attaching a mini-prism.
NON-CONDUCTIVE
Non-conductive fiberglass staff is suitable for workings under electric wire or railway wiring. The body is high tolerant of temperature change (-50 ∼ 120 ˚C). Easy to hold by round shape body. Various types of length are available.