The Auto-Close Gate automatically closes and locks with its unique magnetic closure from any position, keeping your child safe and secure. Designed with this in mind, this versatile gate is designed to securely block doorways, stairways, and other spaces. Right out of the box, the Auto-Close Gate can be used as a pressure mount gate. Simply twist the tension knobs to secure the gate in place. This gate can also be used at the top of a stairway, all of the necessary hardware is included, simply follow the instructions. This gate fits openings 29.5 to 38.75 inches wide with one extension included. Have an extra-wide space to secure? Just add a 1, 2, 5 or 11-Bar extension (sold separately) to increase the size of your gate to 126 inch wide – a maximum of three extensions can be used.