【High-Quality Manganese Steel Construction】Crafted from premium manganese steel, these metal plates are durable, rust-resistant, and long-lasting, ensuring your phone stays securely in place on your magnetic car phone holder. 【Easy and Hassle-Free Installation】With a quick installation process that takes only 1-2 minutes, these metal plates are simple to attach to your phone case or device. No complicated tools or steps are required, making setup a breeze. 【Versatile and Compatible Design】This set includes two 4.5cm x 6.5cm rectangular metal plates and two 4cm diameter round metal plates, designed to work perfectly with any magnetic phone holder for your car. Ideal for various phone case types and holders. 【 Matte Surface for Easy Cleaning】The matte surface of these plates not only adds a sleek, modern look but is also easier to clean and maintain compared to standard metal plates, helping keep your setup looking fresh and neat. 【Non-Magnetic but Magnetic Phone Holder Compatible】Please note that these metal plates are not magnetic themselves. They are specifically designed to be used with magnetic phone holders, offering a secure and reliable attachment for your device while driving.