Over 10 years long life span; maintenance free; zero malfunction ! We have model series JCD- which can connect plastic insulated cooper, aluminum conductor and branch line of energy meter. Application: Guan Tong Electricity meter clamp a connector with low resistance, reliable connecting, stable pressure, easy installation, zero malfunction and high cost performance. It can be applied in connecting plastic insulated cooper, aluminum conductor and branch line of electricity meter. It’s an ideal energy saving clamp to replace parallel groove clamp, wedge-shaped clamp, piercing clamp, pressure pipe etc.