Fork design provides for fast and easy installation, without the need to remove fastener;Metal insulation grip sleeve crimps to wire insulation, providing protection to the crimp joint during high vibration applications;Internal barrel serrations assure good wire contact and maximum tensile strength;UL Flammability UL 94V-2/HB, maximum insulation temperature 221°F (105°C);UL and CSA rated up to 600 V per UL 486A/B, where applicable