Material: Made from strong and durable ABS plastic, lightweight, sturdy and well constructed. Works well in cataloging traditional wood molding shapes. Size: 25cm diameter multi-function contour profile, available in both inches and centimeters. Size on both sides, and both sides are available. Simple to use: just press the teeth of the pins onto a shape and trace. If the pins are too loose, you can simply use pliers to press down on the ends of the brass plug to restore some tightness. Convenient and save your time and energy. Practical Tool: Useful tools to operate all types of modeling. The movement of the pins is really flexible, which makes measuring and cutting easier. A great tool to take the guesswork out. Wide Application: This contour gauge is suitable for measuring many irregular items, winding pipes, metal sheets, circular frames, pipes, tiles , laminate, wood flooring, ductwork, upholstery, carpeting, molding, etc. Please be careful when using to avoid injury.