The Dreambaby Cosmopolitan 9 cm Gate Extension works with the Dreambaby Cosmopolitan Easy-Close Security Gates to extend the width of the gate. Extensions add versatility and many extra uses to safety gates. Extensions allow you to use gates all around the home, including in areas with wider openings. This adds extra safety for your young ones. Safety gates are a very important part of at-home safety. They provide safer boundaries for your child, preventing them from entering potentially dangerous or unsupervised areas of the home.