This lockcase is installed directly into a guestroom door and works alongside the Classic Reader and Control Module or Type 2 LCU lock setups. This unit is fully disassembled and tank-cleaned to remove dirt, old lubrication and foreign materials. The 9-volt motor assembly that this unit contains is remanufactured and thoroughly tested for operation and durability; any worn or damaged components are replaced prior to being reinstalled into the lockcase assembly.