Outside slide guide for strong combine and safety.

Square rungs for non-slip.

The free standing configuration is ideal for a multitude of

 jobs, especially hedge cutting and pruning as it is unsafe 

to lean a traditional extension ladder against hedges, shrubs 

or trees etc. It is also excellent for decorating as you do

 not have to lean against the wall you are painting. 

http://www.ladderkingdom.com