Dagger Tools 37" series adjustable curve (spline) template maker layout tool, can effectively capture a auto body panel shape or most all other surfaces, and lock in the form for use in the layout of a buck, wire form, and a template. It can be and effective form checker also. Offered in two lengths: 37" & 107" with a series of locking points that allow you to lay on the panel and lock in the detail. The spline face is .035 thick spring steel at 1 1/4" width allowing it to replicate infinite panel details. Superior tool, heavy-duty construction for accuracy for years of service. For metal shaping, metalworking, sheet metal fabrication, auto body repair and restortation, aircraft panels, and the metal arts.