Marking and spotting plates are tools used in manufacturing and engineering to scribe or mark lines and contours on workpieces. A marking plate usually consists of a flat, planar block of steel with a hardened surface that is resistant to abrasion and damage. Marking plates are usually placed on a workbench or work table and serve as a reference surface for marking out lines on workpieces. Workpieces can be attached to the plate to stabilize them and allow precise marking. A spotting plate is similar in design, but with a finer surface roughness and is usually made of cast iron. Spotting plates are used to mark or inspect finer contours or surface structures on workpieces. For this purpose, special spotting inks or marking pastes are applied to the surface of the spotting plate. The workpiece is then carefully placed on the spotting plate and lightly pressed to leave an imprint of the contours. Marking and spotting plates are very useful tools that are widely used in manufacturing and engineering. They are easy to use and can last a long time if handled properly. The use of scribing and spotting plates can help increase the accuracy of workpieces and components and allow for more efficient production.