These are diamond chisels made by the Chinese tool manufacturer WUTA. This manufacturer gives the impression of focusing on quality despite their affordable prices. This is a set of 4 chisels with a 4mm pitch, including 1, 2, 4, and 6 prongs. Compared to domestic brands, this is a relatively inexpensive set, but it has been hardened and the cutting edges have been polished, so it has sufficient performance to be used as a main tool. (The strength and durability of steel vary greatly depending on whether or not it has been hardened.) Also, with 1, 2, 4, and 6 prong chisels, this is a comprehensive set of 4 that can handle any situation, such as corners and pitch matching. ◇Material◇ ・Carbon steel (heat-treated) ◇Contents◇ ・4 diamond chisels ・Case ・Storage bag ・Instruction manual ※Oil has been applied to prevent rust. Please wipe it off before use. ※Due to imported goods, there may be cracks or breaks in the case. ※Please be aware of similar products that have unauthorized reproduction of our images and text. Our products are all inspected and adjusted before being described. ¥200 off when combined with other products. (Please request in the comment section or using the bulk purchase function before purchasing.)