Features: 1) Piercing connector, simple installation, does not need to strip the cable coat 2) Moment nut, piercing pressure is constant, keeps good electric connection and makes no damage to lead 3) Self-seaming frame, wetproof, waterproof, and anti-corrosion, extends the using life of insulated lead and connector 4) Adopts special connecting tablet, applied to joint of Cu (AI) and Cu (AI) or Cu and AI 5) Small electric connecting resistance, impulse current can be up to 15kA 6) Special insulated case body, resistance to illumination and environmental aging, the insulation strength can be up to 6kV 7) Arc surface design, applied to connection with the same (different) diameter