These multi-range hex-head connectors cover 95 percent 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.