This galvanized iron garage door deadlock is designed to add an extra layer of reliable security to standard residential garage doors, operating exclusively from the interior of the space to prevent unauthorized external access. Constructed with galvanized iron material, it resists common wear, corrosion and long term exposure to regular garage temperature and humidity fluctuations, holding up well to years of frequent use without premature damage. It mounts directly to the vertical track of the garage door, and supports installation on both left and right sides of the door frame to match different garage layout needs. The full set of included self-tapping screws eliminates the need for extra specialized hardware during setup, so most users can finish full installation in a short period of time without professional assistance. It works as a practical supplementary security choice for overnight stays, extended vacations, or any scenario where you want to reinforce your garage against unwanted entry. Material: Steel Alloy.