Multiple Applications：Techfun Contour gauge duplicator is ideal tool for copying curves on winding pipes,tile flooring, irregular shape frames ,and ducts in home or outdoor. Excellent Size : 10 inch length and 3 inch deep fingers will measure profiles up to 1-1/4″ precisely record the cross-sectional shape of a surface. Easily Use & Reset : Press the gauge teeth against the object to match the contour and then track the shape you need.Easily Reset the gauge by pressing the teeth against flat surface Bonus 6 inch stainless Ruler :Mini size stainless ruler is so helpful on the hand. It’s too small and be careful of the a little shape edge once you put in the pocket. Satisfaction Guaranteed: Techfun Contour gauge with high quality ABS plastic, high strength, durable, anti-rust. Techfun will garantee any products sold by Ojofo Direct.