Why do you need it? Are you worried about outdated thresholds for cars after scratching?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 even get kicked. You need to provide complete sill protection for your car. 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 Content:4pcs/setInstallation Method1. Compare the protector with the door before installation and make sure it fits your car and is compatible2. Clean the dirt on the doorstep with a damp cloth and wipe dry.3. After comparing the installation positions, remove the 3M tape and insert it4. The temperature during installation must not fall below 15 degrees, otherwise the paste effect will be affected. At outdoor temperatures below 10 degrees, you can first heat the door sill panel with a heat gun and then heat it with the hot air fan for a few minutes.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 to you as soon as possible and promise to provide you with the best after-service.