Lebert Equalizers instead of parallel bars

I was wondering if the Lebert Equalizers: http://www.lebertfitness.com/Products/LebertEqualizer/Home.aspx

will do instead of parallel bars for any of the courses.

For most of the dip progressions the backs of two chairs will suffice.

 

In the long run, longer parallel bars will be better.

They might have some uses, but they are too short for dips if that's what you are thinking. 

lol, still amazed how they advertize these things. you can get one out of PVC or something, be creative.