The dual point mortise lock with 9-7/8" hole spacing is specifically designed for sliding patio glass doors. Featuring a self-adjusting hook design and center pin location, this lock provides enhanced security and ease of use. The plated dichromate finish ensures durability and resistance to corrosion. Designed to exceed AAMA requirements, this lock offers superior performance and reliability. Please note that mounting hardware is not included. Upgrade your sliding patio door with this high-quality dual point mortise lock for added security and peace of mind.