Abstract: A shear type miter cutter has a pivotal blade and four linearly sliding blades. The linearly sliding blades may be manually linearly positioned to preset locations for a particular size or type of stock material. The linearly sliding blades are further linearly adjusted automatically upon rotation of a stock material support fence, to ensure optimum alignment between the pivotal blade and the linearly sliding blades. The automatic adjustment allows an operator to make rapid changes in cut angles for a given stock material, while still yielding finished cut edges of high quality and precise angular orientation. A variety of designs for rapidly manually setting the cutter to specific preset angles and specific stock materials are also disclosed.