- Underbody protection: Protects the metallic jack receiving rail on the underbody of most vehicles. - High quality material: Made of high quality rubber material, durable and resistant to damage; helps prevent chassis rails from being pinched, bent or broken. - Stable support design: Slotted disc design with a raised strip on the surface provides stable, slip-free support. - Universal compatibility: Fits as a support disc for jacks with a 125 mm (4.92 inch) diameter; universal and practical. - Use scenarios: - Oil change or brake service on most passenger cars, using a floor jack with a 125 mm diameter support to protect the underbody rail. - Tire changes or wheel rotations on SUVs and light trucks, with stable, non-slip support to prevent rail damage. - Lifting on uneven or soft surfaces such as driveways or gravel, where the raised strip and slotted disc design help distribute load and reduce slipping.