These multi-range hex head connectors cover 95% of everyday applications making them the simple choice for all of your wire connection needs. Don't worry about using a hex tool to install - you can't over-torque this connector because it's patented hex head design strips out at UL torque saving the wires and your fingers. 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.