You may be able to fix one end of your steel post in the ground, but that still leaves the other end exposed to the elements. Now, with the DOGIPOT Square Post Pyramid Rain Cap, you can make sure you secure the inside of your post from everything outside. Rain, debris, and trash can get stuck inside your post when it is left open, leading to rust or a trashy look. With this cap in place, nothing is getting in that can do any harm to your post. The Square Post Pyramid Rain Cap easily fits on DOGIPOT 2-inch square posts—such as the 4-Feet Galvanized Steel Square Post—and their 1-3/4-inch square posts—such as the 8-Feet Galvanized Steel Telescopic Square Post and 8-Feet Polyethylene Telescopic Square Post. So, you can add it to any DOGIPOT post for an extra level of protection. It easily clips on to ensure that no objects or excess moister squeezes inside.