The brackets are made of superior stainless steel metal with a black textured surface, ensuring anti-rust and durable usage. It's easy and safe to install with the 6 holes design. The screws are made of quality iron with heat treatment to harden, guarantee screws no broken.If you have any problems with our products, please contact us by email, our staff will provide services 24 hours a day. If for whatever reason you are not 100% absolutely happy with your product, return it for and a full refund will be provided - no questions asked.