Most corner poles rely on some type of fixed, numerical scale to gauge brick or block coursing. Roy Sarasin, a Canadian mason with more than 25 years' experience, thinks he has come up with a better system. Sarasin was tired of doing mundane calculations to determine coursing and grew weary of trying to read numerical scales. Working in his garage, he invented a corner pole that uses a color-coded scale, rather than numerical markings. The system Sarasin developed uses a series of white, blue, and red bars, repeated in the same sequence from the bottom to the top of the pole. The colored bars make up a proprietary sliding scale that can be used to determine the proper spacing of masonry coursing. The three-color, sliding scale automatically and uniformly adjusts mortar joint thickness in increments of 1/50-inch. This allows brick courses to be precisely laid to match specified sill, lintel, and soffit heights. It also eliminates the need to cut brick because the top course has come in too tightly or to tear down a wall because the top course has come in too loosely. The corner poles are constructed of heavy-gauge, extruded aluminum and attach to heavy-duty mounting brackets. To suit a variety of conditions, a wide assortment of mounting brackets are available for all models. Gauges on all models are protected against abrasion and mortar by clear plastic guards. Users say the poles are sturdy and the mounting brackets give exceptional support.