Our 3-in-1 Flagpole Mount is perfect for use on a deck, dock or as tire mount. It also assembles for temporary uses such as tailgate parties and special events. With the 3-1 Flagpole Mount, you can hold our 2" diameter flagpoles securely by simply sliding the flagpole on. The base plate is 5"x14" and is made of 1/4" solid aluminum and the insert post is solid aluminum. To attach to a deck or dock use 1/2" Allen screws.