Prime-Line GD52138 Inside Deadlock ? Heavy Duty Galvanized Steel Housing, Fits Get additional security and peace of mind with this Prime-Line Inside Deadlock. It?s a heavy-duty galvanized deadlock that engages in a vertical track and works only from the inside. Use it as an additional inside security lock for nights, vacation and more. Installation is quick and easy, and the deadlock fits most garage doors. This steel slide bolt is 7/8in. wide X 1/8in. thick with heavy duty galvanized steel housing. Features SECURITY LOCK ? Use this Prime-Line heavy duty galvanized inside deadlock as an additional security lock for nights, vacations and more. WORKS ONLY FROM INSIDE ? This type of deadlock engages in a vertical track and works only from the inside as an additional security lock. EASY INSTALLATION ? Installation is quick and easy, and the deadlock fits most garage doors. HEAVY DUTY ? Made of heavy-duty galvanized steel, this inside lock provides peace of mind and extra security, plus it?s durable and made to last. SIZING ? This steel slide bolt is 7/8in. wide x 1/8in. thick with heavy duty galvanized steel housing. USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.