The base metal is made of old iron and the hagane is made of blue paper. This is the most popular finish for chisels made by Tasai. The surface of the chisel is entirely sanded and polished with sen-finish on the surface. It is said that the more it is used, the more the grain of the file takes on a character and becomes indescribably colored. It is a masterpiece with genuine value. It is made by Tasai, a current master craftsman who pursues sharpness, usability, and beauty. Contents of 10-piece set 3mm, 6mm, 9mm, 12mm, 15mm, 18mm, 24mm, 30mm, 36mm, 42mm in a paulownia wood box. ¦ We are happy to combine different items and send worldwide. And holiday are excluded. I receive the question with pleasure. To you in comfort, and want you to enjoy the product. We try to describe any items to the best ability and offer you the best values and an good quality. We specialize in Japanese tradition products, so please look at our other items and enjoy feeling Japanese culture! It is our pleasure to provide high-quality Japanese products to the world. We can provide all kinds of items. Please send a fun life by a Japanese goods! If I can be your further assistance, please do no hesitate to contact me. We hope you enjoy! We try our best to send it to you!! International Buyers – Please Note. ·We do not mark merchandise values below value or mark items as “gifts” – US and International government regulations prohibit such behavior.