Lawsons offer a range of extension and combination ladders and both types are versatile ways of working safely from varied heights. Extension ladders are extremely useful tools for those who work outside of buildings at heights. A key feature of extension ladders is the strength and stability with non-slip feet, which ensure safe use. Combination ladders - also known as combi ladders due to its unique structure. The combi ladder is a multiple positioning ladder with either 3- or 4-way ladder option. These can be very useful for a variety of situations.