Curv-O-Mark® Contour® marker is a compact, time-saving tool used to lay out pipe and structural steel jointsLaterals at any angle, tees, wyes, crosses, elbowsAny type or size of joint can be quickly and precisely laid outNo more complicated mathematical formulas or needless material wasteCan be used to lay out pipe from 1-1/2" to 18" diameter, or structural steel members up to 18"Consists of an X-shaped frame, calibrated protractor, and a triple-jointed marking arm and holderHolder accepts a soapstone crayon (included), felt pen or pencilFrame easily folds into a compact tool that fits into a pocket or carrying caseCan be used right side up or upside down, depending on the direction of the line to be scribedProtractor calibrated on both sides-one in degrees, the other in rise-inches-per foot-to service any type of measurement needOptional combination adaptor accessory allows the marker to lay out joints on larger size pipe, as well as scribe compound angles with just one setting