Contour Marker Jumbo CURV-O-MARK

The Jumbo Contour Marker can be used to lay out pipe from 8 to 48 inches in diameter or structural steel members up to 18 inches. 

It consists of an X-shaped frame, calibrated protractor, and a triple-jointed marking arm and holder. .

The holder accepts a soapstone crayon and comes with a durable web strap to hold the unit in place, and a built-in Dial Set Level (DSL) to find an accurate centre location. 

The frame folds into a compact tool that fits into a pocket or tool kit, and it can be used upside down or right side up. 

The protractor is calibrated on both side - on in degrees and one in rise-inches per foot.