1.5" x 5.5" vinyl fence post hole covers are typically used to cover unused routed holes on a post. For example, if you have an extra line post, but want to use it as an end post, post hole covers can be used to cover one face of the post. These vinyl fencing accessories are designed to fit snugly over the routed hole, but if it is slightly loose, simply apply a small amount of vinyl glue to adhere.