Insulated Non-Conductive tools undergo 100 percent testing to meet or exceed IEC 60900 and ASTMF1505 standards for 1000V. Each tool carries its own unique serial number registered at NUPLA® Corporation. Digging Bars, Post Hole Diggers and Picks are all produced to the same electrical standards with NUPLA®glas handles and high grade, heavy duty steel. Solid NUPLA®glas handles are manufactured in Safety Orange for easy identification. Laser marked 1000V with high voltage double diamond. Used by utilities, railroads, highway departments and electrical contractors.