Each tool is tested to 10, 000v for the complete assurance of safety when working on live equipment up to 1000v AC, GS (Gerpruffe Sicherheit) safety marked, Ergonomic dual compound handle offering the perfect balance of grip & comfort, Induction hardened & precision ground cutting edges for the ultimate in performance, C.K tools are guaranteed for life against imperfect materials or workmanship., Normal wear & tear or damage caused through inappropriate use is not covered.