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. Engineered and certified to European trade ladder safety standard EN131 for your safety and reassurance and is therefore ideal for both trade or domestic use Aluminium construction so lightweight and therefore easy to use, but still very strong - with a huge 150kg weight rating. www.ladderkingdom.com