CompX National disc tumbler deadbolt door lock for up to 7/8" thick material. Key is removable in locked and unlocked positions. Available in bright brass. A 3-digit key number at the end of a part number means those locks are keyed alike to that 3-digit number. A KD at the end of a part number means the locks are keyed different and a KDM means the locks are keyed different and master keyed. N8704 03 415.