The precision chest card measuring film ruler is an essential tool for professionals who need to measure and inspect various defects such as spots, scratches, and cracks. This transparent ruler allows for accurate measurement of line widths and diameters, making it ideal for quality control in manufacturing and construction. Simply place the ruler over the area to be inspected and read the measurements directly through the transparent film. Features -Color:Multi -Material:Plastic -Size:10.00X5.70X0.01cm/3.93X2.24X0.00in -High precision measurement: the chest card gauge film ruler ensures accurate measurement of various dimensions, making it ideal for precision tasks. -Multifunctional application: this tool can measure dot gauges, line gauges, spots, cracks, and other surface defects, providing versatile usage. -Clear comparison: equipped with a transparent scratch ruler, it allows for clear comparison of surface scratches, enhancing inspection accuracy. - and reliable: made with plastic materials, this measurement tool offers excellent durability and reliability for longterm use. -Easy to use: designed for simplicity, it is easy to operate and suitable for various work scenarios, making it userfriendly for professionals and amateurs alike Package list: 1 x Flaw Detection Film Ruler