There are actually two different types of pull behind mowers, and for the most part, they do look very similar. There are finish type mowers that are made for large open, smooth grass cutting like very large residential lawns or like golf courses. Then there are the heavy duty ones, that are essentially small brush hogs. The DR brand, are classified as brush cutters, and my brother has one of the older self-propelled walk behind models, and that thing will cut just about anything it rolls over, up to about 2" diameter saplings. It's a beast!