Complete any wiring project with this 20-pack of Hyper Tough Twist-On Large Red Wire Connectors. The wire connectors twist on for quick easy connections and the bold red color helps you locate connectors easily. These connectors are for use with copper wire only and are rated for a maximum of 600V and 221°F (105°C). Before wiring shut off power to the circuit at fuse box or circuit breaker. This product is UL listed for use as a pressure wire connector with solid and stranded wire in the combinations listed inside packaging. Connect wires together safely with the Hyper Tough Twist-On Large Red Wire Connectors.