Features: Adopts superb ABS material, comes with high density symmetric s-trip design, stable and practical use. Simply press the contour gauge onto a shape so that it can be used to measure the shape of irregular items. Clear scale display and convenient to read, h-ard to deform and easy to use. M-agnetic device can be installed on the back for practical fixing use. Thoughtful tool for operating on car body, carpentry and different kinds of modelling,efficiencyraising and t-ime-saving.