Most walkers are made from aluminum with some of the heavy duty models made from steel. Most walkers are height adjustable to fit a variety of user heights, have hand grips, and have rubber tips or skids at the end of the legs. They work by picking up the weight a little and scooting it forward, allowing you to take an extra step, then putting your weight back down on it for stability. Some walkers come with wheels on the front legs making it easier to scoot the walker forward. The surface has to be relatively smooth to operate a walker safely. Overall, a walker provides a great deal of stability and can help you regain more freedom.