I use this exercise pen as a fence/barrier inside my garage to prevent my dogs from getting into areas I want to keep them out of.  It's way long enough to reach from one side to the other of the area I want to protect, however, I do have to simply secure each end up against something (which is easy enough to do) to prevent my two 15-lb. dogs from working together to push an end aside & slipping past it. Once the ends are secured, the fence itself stays nicely in place.  Also the height is great & though one of my dogs is a jumper, the height prevents that. Especially like that it's very easy for me to move an end aside when I need to.  I couldn't be happier w/this purchase & the price!