Unsurpassed quality and durability in a high-leverage, easy-on wing-type design Easy-on, easy-off without tools Expandable square-wire spring instantly adjusts to the shape and size of the splice, then bites down to thread onto the wires without ratcheting and creates a strong, vibration-resistant connection No pre-twisting or tools are necessary Tough thermoplastic shell shields against environmental extremes Flame-retardant, non-porous, and non-corrosive shell resists surface cracking and chemical action Temperature rating: 105 degrees C, 221 degrees F Superior flash-over protection, high dielectric shell features deep skirt design to prevent exposure of bare wire Buttress threads screw into wire insulation Wire Size: 14-6 AWG