A square post can be used for anything, especially when it is being fitted in a dog bark park. But for a post that can used in a whole range of situations, and can be extended, is the 8-Feet Polyethylene Telescopic Square Post. To suit a whole range of uses, this post can be extended from its base length of 4 feet all the way up to 7 feet. When you have almost 8 feet of hardware, you can do almost anything. This product is perfect for mounting pet waste signage in dog parks to ensure that your local bark park is kept clean, and can also mount Poly Dogipot Junior products. This strong metal can also be fitted securely into the ground and bolted there, to ensure that it cannot be stolen or bent.