Accurate Measurement: The crack gauge is perfect for professional work. You can accurately measure cracks in the range of 0.1 mm to 2 mm. It can accurately track cracks, adjustments, and thicknesses. The ruler provides you with excellent measurement accuracy. Package Contents: Includes 2 pieces of rulers with high-resolution screen printing. Each ruler is equipped with 3 different measuring scales to cover a variety of applications. Transparent: Simply place the crack gauge on the object or crack to be measured. Thanks to the ruler's transparency, you can perfectly capture the width of the crack and accurately mark the positions. Designed for Portability and Ease of Use: is specially designed to meet your lifestyle and needs. With a thickness of 0.5 mm, it is very robust and has a stability similar to a credit card, so you can take it wherever you go. Anyone can easily use it, regardless of experience. Versatile: Whether you are a construction worker, art conservator, or a DIY enthusiast, it will meet your needs. The crack gauge is a versatile and reliable addition to your toolbox, providing you with the precision you need to perform your tasks safely. Note: All data is measured manually, please allow 1-3 cm error; due to differences in light and screen, there may be color differences, please refer to the actual received item.