This Locksmart Door Lock Kit comes with a cylinder and keys, ensuring that your doors are secure. The kit is designed for easy installation and use, with a 1-year manufacturer warranty. It is compatible with a variety of interchange part numbers, including DLK163, DLK553R, 6905134010, DL162, 53-1559, E1400F, 38-0142, DL74400R, and 9D1151. The manufacturer part numbers are DL-109R and DL74400R. This door lock kit is perfect for those looking for a reliable and convenient way to secure their doors.