ADJUSTABLE AND LOCKABLE: The tightness can be adjusted as needed. It is particularly useful for drawing irregular and complex objects. It can be locked and fixed after each adjustment to ensure accuracy.AVAILABLE ON BOTH ENDS: Our contour gauge comes with a roller end and a pointer end. The roller end provides smooth movement, and the pointer end offers precise marking. The pen holder can be moved up and down to easily switch between ends.DURABLE AND CONVENIENT: The contour gauge is made of high-quality metal, ensuring sturdiness and durability. Its compact size makes it easy to carry and store. It can be conveniently stored in a toolbox for portability.ACCURATE SHAPE COPYING: A simple and effective tool for instantly copying any shape. Accurately transfers templates for curved and irregularly shaped objects.EASY TO USE: The locking mechanism is simple to operate, allowing one-handed use. Insert the pencil into the holder, press down, and trace along the surface to duplicate the shape.