Prime-Line Defender Security Mortise Door and Drawer Lock is designed for doors or drawers with a material thickness of 7/8". It requires a 7/8" diameter hole for installation and comes with two keys that are keyed differently for added security. Made from steel with a brass-plated finish, this lock combines durability with a classic brass look. The product is conveniently skin packed and sold as a single unit, making it easy to handle and install. Model Number: U 10666