Jackson Safety #1 contour marker is a compact, timesaving tool used to lay out pipe (from 1-1/2 in to 18 in dia.) and structural steel joints of any type or size. Quickly and precisely laterals at any angle, tees, wyes, crosses, elbows. Pipe and steel marker features an X-shaped frame, dual calibrated protractor (degrees and rise) and triple-jointed marking arm and holder that accepts a soapstone crayon, felt pen or pencil. Folds to fit into a pocket or tool kit. Can be used upside down or right side up.