Magnetic Clip-Weld Frame Rail Adapter for Subframe Vehicle Floor Jacks. DURABLE: This floor jack pad is made of solid aluminum with a nylon insert in the groove to protect the clip-weld from damage or deformation when lifting the vehicle. UNIVERSAL FIT: The floor jack's jack pads fit most unibody vehicles and most floor jacks. Each slotted jack pad has a 0.51 inch opening width and a 1.02 inch slot depth. The base diameter is 2.83 inches. STRONG SUPPORT: Unlike ordinary rubber jack pads, it is equipped with 2 mounted neodymium rare earth magnets to help hold the jack in place and increase stability during vehicle lifting. Note: The jack pad should be used with a floor jack that has a flat top. If your jack is an older model, you may need a spacer. This jack pad is not suitable for convertibles. Please check the size carefully before ordering. Please verify the item meets your requirements before use. Tips: Due to different production batches, the actual product may have slight variations or color differences, which do not affect functionality. Color: As shown Material: Metal Package Contents: 1 x Vehicle Floor Jack Pad Only the above package content is included; other items are not part of this sale. Note: Lighting and display settings may cause minor color differences between the image and the actual item. Measurement error allowance is +/- 1-3 cm.