The 1 3/8" Mushroom Type Center Stop is made of malleable steel and accepts a 1 3/8" to 1 5/8" drop rod and 2" anchor post. Its pre-cut channel helps keep a gate securely in place and with its one-piece design, it's easy to install. It's crafted from sturdy steel so you can count on it to do its job in a wide range of applications.