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The CL thickness ruler can be used to measure the thickness of an object using a slide scale placed on a 5.9-inch (15 cm) ruler. You can measure 3D objects from 0.004 to 4.7 inches (0.1 to 120 mm), such as spheres, deformed parts for accessories that are difficult to measure the thickness with a standard ruler, and screws for DIY projects. The material is made of acrylic resin, so it is difficult to damage delicate objects, and it can also be used to check the thickness of the stems and leaves of pearls, metals, and plants. The slider part is non-slip so you can easily measure with one hand. With ground point markings that make it easy to measure the height and depth, this product allows for a variety of measurements with this product. It can be used in a wide range of situations, from daily use to DIY and handicrafts, to record plant growth.