Gardner Bender Wire Connectors are engineered to exceed the expectations of professional electricians. Perfect for commercial or residential applications GB Wire Connectors offer world-class quality, performance and application versatility. GB's exclusive Uni-Lok Universal Wire Connector is a versatile and cost effective connector designed to accept a wide range of wire combinations. Unlike other connectors made with a hard polypropylene shell these connectors feature a softer nylon shell designed for comfortable twisting and mini-wings to provide additional torque. The Uni-Lok features a long skirt to prevent exposure of bare wire while the zinc-plated square spring inside instantly adjusts to the shape and size of the wires upon insertion. Use for: Large appliances, Indoor lighting, Switches, Air conditioners.