What's the difference between a step ladder and an extension ladder?
A step ladder only goes to one height and set up as a triangle to help keep you balanced. These ladders are mostly used for indoor activities, whereas extension ladders are more of an outdoor ladder. These ladders extend to different lengths to help you reach whichever height is needed. Instead of the triangle shape, they are propped against something, often a house, to help you work at an incline.