This is a keyed step-on sliding door lock. The steel bolt securely locks your door in a closed or ventilating position. Convenient foot operated design. Allows you to lock your door or open it slightly and still allow ventilation while keeping your home secure. Helps to prevent unwanted sliding and lifting of the door. All the necessary mounting hardware is included for a quick and easy installation. Unlocks with provided key. Uses B1 keyway, ILCO (1098M). To lock or unlock the door you will first need to make sure the key is in the unlocked position. You may then step on the lock to engage it in your fixed doorway and pull up to unlock. To make the lock fixed in either the locked or unlocked position the key will need to be inserted and the lock engaged in the locked or unlocked position.