Use our Panel Scriber for making realistic looking recessed panel lines on models. Other scribers just move the plastic so you get a mound on the side of the line like a plowed field. Ours actually removes a thin hair of plastic without distorting the plastic. Made of stainless steel with a knurled no-slip handle. Has scribers on both ends so it will last twice as long. Will work equally as well on half hard brass and aluminum. 1/4 inch dia. x 6 inches long.