Telescopic Measuring Rod: Our measuring rods are adjustable from 6 -18m/19.7-59ft (with a minimum contraction of 4.9ft, ideal for power line inspections in confined spaces, elevated work areas or post-disaster sites. Epoxy Resin Construction : Our high density epoxy resin poles, insulated non-conductive, impact resistant and resistant to extreme weather (rain/snow) can be used for 5-10 years with no problem, more durable than metal poles. Insulated to 10-500kV: Safely measure live lines up to 500kV without the risk of downtime or electrocution, trusted by linemen, telecoms workers and engineers. Multi-industry applications: The measuring rod reads measurements directly without calculations, ideal for power line gap checks, 5G tower antenna alignment, bridge height checks, as well as measuring the height of trees, wires, ceilings and the dimensions of timber stakes. Also measures the height of trees, power lines, ceilings and stakes. Instant installation and use: no tools required! 3 seconds to lock the telescopic section; non-slip grip and glow-in-the-dark markings ensure accurate readings in low light conditions.