Abstract: A writing instrument includes an elongate body having opposed first and second ends, a longitudinal axis and a bore therein extending from the first end. A marking body, such as one having lead or a colored material, extends from the first end and is seated in the bore, while a connector is coupled to the second end. An eraser, such as a rubber eraser, is coupled to the connector and is configured to erase markings made by the marking body. The eraser includes a flat surface that is configured to prevent the writing instrument from rolling about the axis down an inclined surface contacting the elongate body. The flat surface may be oriented on a plane that is substantially parallel to the axis. The flat surface may also include a dimension perpendicular to the axis that is larger than another dimension of the elongate body which is also perpendicular to the axis.