This is one of my favorite sashigane, or Japanese carpenter's square. Lightweight and durable, easy to use and easy to read number. I love the little groove that runs the full length of the square, makes it really flexible and springs back easily. The metal looks very strong and is not easily dented or damaged. The numbers were big enough to read without glasses as I'm nearsighted. Just the right length for me to fit in my tool box without being too big.