Pulls and Handles are two terms commonly used to describe the same thing:  Hardware pieces installed on cabinet doors or drawers which are gripped with all fingers to facilitate the opening and closing of the door or drawer and also to enhance the beauty of your cabinetry.  Unlike Knobs which almost always have only one screw hole, Pulls and Handles generally have two.  Dimensions provided included the overall Length, Center to Center (the distance from the "center" of one screw hole to the "center" of the 2nd screw hole) and Projection (how far the handle protrudes from the surface of the door or drawer once installed).