The Avant Banister Kit is crafted for use with the 5-12501 KiddyGuard gate so that it can be installed at the banister of any standard set of stairs. This device may be used at banister with a minimum size of 7/16", and maximum of 2" on either a square or round post. The "Locking Side" kit includes all hardware necessary to secure the Locking Strip of the gate your stairs banister for optimal security in your home. Use the separate "Housing Side" kit for the opposite side of the installation if desired. Available in black or white to complement your gate system.