According to my experience the Glarks Insulated Electrical Terminals Connectors didnt live up to their advertised quality. While the connectors were easy to use, the insulation on the wires started peeling off after only a few weeks of use .The one positive aspect was that the connectors were relatively cheap. However, the lack of durability greatly outweighs this. Save yourself the hassle and invest in a BETTER quality electrical kit..