Features. Perforated 116 in. offset 24 in. blade accepts utility knife point for fast efficient drywall scoring. Molded high impact head with hand grip and board guide. Screened thermal-bonded black 18 in. and 116 in. graduations. Large bold easy reading graduations. Extruded aluminum blade assures durability. 24 in. rock ripper with structo-cast head perforated aluminum blade. Dimension - 2 x 20 x 27.44 in.. Item weight - 1.27 lbs.