Features: Protect the undercarriage metal jack point railing that is on most vehicles.Highly durable and resistant to damage, it will keep the chassis rails from getting pinched, bent, and broken.Rubb more→er is soft enough to not harm your vehicle's metal yet rigid enough to support it.Great for DIY vehicle maintenance or taking one with you in the car Installation Instructions: Please exercise proper safety precautions when working on a vehicle.Unlike the aluminum kind that will do damage to your paint, This will NOT harm the painted surfaces.This Pad works, making it possible to use a hydraulic floor jack without doing damage to your car or its undercarriage.The perfect item and a must have