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. Specifically designed for making positive ground connections with a hole in the tip of the connector to feed ground wire through. GreenGard connectors feature the same live-action as GB WingGuard connectors with knurled wings for a sure grip and greater twisting leverage/torque. In addition GreenGard connectors offer added plating protection for corrosion resistance in grounding applications. Inside the connector a zinc-plated square wire spring ensures a secure connection that resists corrosion. The thermoplastic shell is designed for long-lasting strength and resists chemicals while the deep skirt supports smooth wire entry and coverage of stripped wires. Use for: Ground applications, Building wire, Lighting fixtures, luminaries and signs.