Abstract: A device is provided for cutting roofing caps efficiently and easily from standard asphalt or fiberglass roofing shingles. The device comprises a support base to hold a shingle, the support base being hinged to a top plate having cutting blades affixed thereto. The support base has cut-outs corresponding with and acting cooperatively with the configuration of the cutting blades. Standard shingles can be cut to desired patterns. Preferably two interior, wedge-shaped cut-outs and two exterior, beveled cut-outs are employed in the support plate, and cutting blades are arranged in the top plate so as to penetrate the shingle along the bevels and the sides of the wedges and thereby cut the shingle in the desired pattern and permit unwanted shingle material to fall away and be discarded, producing three precision-cut roofing caps from each shingle.