These items were found during a thorough cleaning. Please refer to the photos for details. These are unwanted items from my grandfather, who ran a civil engineering company. I believe they are probably unused, but as a private seller, I am not an expert and cannot determine the exact condition. Therefore, it would be best for someone with more knowledge to purchase them. I tried polishing some of the rust, and it came off easily. If you wish, I can send them to you in a cleaned condition as much as possible. The price is set based on the manufacturer's price and market price. Please feel free to negotiate the price.