You will receive one key to unlock the exterior bezels and one key to unlock the interior cash box. This set of keys should work in any of the following model Nautilus Hyosung ATM machine that have the removable cassette: MB 1000 MB 1500 NH 1800 NH 1800CE NH 1800SE NH 2700 NH 5000 NH 5200SE NH 5300 Halo (NH 2600) Halo II (NH2600SE) Force (NH 2800SE)