Issuing a seamless improvement to all compatible patio door handles, the 801 Patio Door Lock provides a classic style and a convenient key-locking feature to your surface-mounted patio door handle. Beyond upping the aesthetics of your patio door handle and patio door with the patio door hardware’s die cast zinc and powder coat paint to resist visual wear and tear, this patio door lock can be smoothly integrated into your patio door handle. The 801 is designed to fit our 800K, 800KBL, and 802KBL surface mount patio door handles, and can be directly installed into your patio door handle.