Unused security door lock keyhole cover type auxiliary lock Key Out-2 for DS. No installation required! This easy-to-use security product simply inserts into the keyhole to guard it, protecting against burglars and mischief. You can use it when you go out, as well as when you're at home or sleeping, by inserting it and locking it from the inside. For MIWA (Miwa) DS (Disc) cylinder.