Hauck Stop 'N Safe: This model is a simple safety gate that is mounted between two walls or in door frames. It has a manual locking mechanism that children cannot open.

Hauck Close 'N Stop: This model also has a "Close" function, which means that it closes and locks automatically as soon as you let go. This can be particularly useful if you have your hands full and cannot close the gate manually.

Hauck Open 'N Stop: This model has an "Open" function, which means that it can be opened in both directions. This can be more convenient in certain situations, depending on which way you want to open the gate.