This kit is designed by CAD and designed for great fit and quick install, and the high precision equipments(CNC) processED it, to ensure product quality. The surface of kit is disposed to prevention of corrosion. Features: 1) Modern design 2) Corrosion resistance 3) Light weight 4) High intensity 5) Aging resistance 6) Excellent dimension stability 7) Long service life 8) Smooth surface 9) Good flexibility, Even Kids Can Use It 10Skillful manufacturing to ensure compatible with factory latch and included additional latches 11) Retains Factory Seals, Electronics, Safety 12) Adjustable leverage and height upon installation to tune the doors operation, and give it the look and feel you want 13) No cutting 14) No welding 15) No drilling 16) No painting nor Re-painting 17) No leaking (doors close and seal like factory) 18) Complete reversible installation Lambo Door Conversion Kit Include: . lambo Door Hinges . Nitrogen Gas Charged Shocks . All Mounting Bolts & Nuts . Detail Installation Guide Limited Lifetime Warranty on Door Hinges 1- Year Warranty on Gas Shocks Material: High quality steel The kit need to bolt during installation,and its totally reversible meaning you can easily remove it once you dont need it. The kit easy to be installed with bolts. And it also can weld,if you want.