A line gauge device for constructing lines and contours on auto body components featuring a first pivot arm and a second pivot arm pivotally connected via a pivot component. The pivot arms can pivot toward and away from each other. The pivot component is biased to pivot the pivot arms away from each other. A threaded adjustment rod with a thumb wheel disposed in both the first and second pivot arms functions to secure the pivot arms in a particular position. A utensil holding component is disposed on the second end of the first pivot arm. A surface guide base with surface guide rollers is disposed on the second end of the second pivot arm.