This model has exceptional wire-range capacity which can handle wire combinations from as small as 22 AWG to as large as 6 AWG. The swept wings offer extra leverage and less effort for large wire combinations. The unique, "ez-ribbed-grip" cap installs in seconds and the fixed, live-action "square-wire" spring threads itself as it draws wires into the connector and creates a secure pressure grip. The deep skirt protects against flash-over and turned-back strands, providing excellent dielectric protection.