The blade is subjected to high-frequency welding technology, and the cutter body is made of super-hard tungsten steel, with high hardness, toughness and sharpness. Complex process technology improves wear resistance and greatly increases service life. Unique design, super hardness and impact resistance ensure blade sharpness, your first choice in quality. Industrial grade bits. Hardened steel body with anti-recoil. Construction and heat resistant Teflon coating. Suitable for wood, MDF, chipboard, plywood compact board; Please avoid cutting ferrous metals and other materials such as steel, iron, sand, etc. Product Description Specification: Suitable for all types of hobbing or engraving machines. Suitable for wood, MDF, chipboard, plywood compact board and so on. Package includes: 2 x router bits