Why do you need it? Worried about outdated thresholds for cars after scratching? The door ages due to exposure. When getting in and out, the sills wear out, scratch and are even stepped in. You need to provide your car with complete sill protection. Special thresholds can improve the appearance of your car.Specifications:Material: stainless steel100% brand new and high quality3M self-adhesive attached, easy to install, no tools requiredPackage contents:4pcs/setInstallation method1. Compare the protection with the door before installation and make sure it fits your car and is compatible2. Clean the dirt on the door sill with a damp cloth and wipe it dry. 3. After you compare the installation positions, remove the 3M tape and insert it. 4. The temperature during installation must not be below 15 degrees, otherwise the paste effect will be affected. At outdoor temperatures below 10 degrees, you can first heat the door sill strip with a hot air blower and then heat it for a few minutes with the hot air blower.5. Try to install the device in a place with sufficient sunlight and without rain. Do not wash the threshold with water for two days after installation, as this increases the durability. NOTE: If you find that this product is not compatible with your car or there is a quality problem with this product, please contact us immediately. We will reply you as soon as possible and promise to provide you with the best after-service.