Three-Point Hitch. The three-point hitch is a standardized method of attaching implements (equipment) to tractors, first developed by Harry Ferguson in the 1920s. The three-point hitch uses two lower connection points and one upper point which provides a rigid connection. Hydraulic cylinders operate on the lower arms to raise and lower the implement. An additional hydraulic arm may act on the upper arm to control the draft (depth) of tillage equipment.