These are a little fragile --- poles can crack and the base requires retightening frequently --- and they are not the most secure if you have a very fast dog pushing through them. But they're a good indoor cheap option for basic weave exercises, and quite portable. You can use a standard phillips-head screwdriver to tighten (and make the legs a bit more sturdy / harder to swivel) or to dismantle and turn into 3 sets of 2x2s.