A tool for facilitating the cutting of shingles having a base plate and a tubular member. The tubular member comprises a slot on the horizontal surface of the tubular member that extends the entire length of the tubular member and that is offset from the center of the tubular member. The base plate comprises a semicircular cutout with a terminal point that coincides with the center point on the first side edge of the tubular member. The first side of the tubular member is aligned with the longitudinal axis of the base plate so that the tubular member is off-center on the base plate.