The first graders were basically a wide board attached to a set of shafts and pulled by a team or pair of horses to level land out. The early Iron framed graders were still pulled by horses, before tractors started to be used in the late 1890s, followed by the crawler tractor in the 1920s, and re invention of the self propelled machine by removing the front axle of a tractor and boltring a long frame with the axle on abd a blade under neath, adjusted by a hand wheel.