Features: 100% brand new and high quality. Made of carbide material, with high hardness and long service life. Work well with 1/4 inch electric trimmers or engraving machines. Suitable for slotting, engraving, cutting, milling of hardwood, cork, composite board, density board, chipboard, etc. Necessary tools for woodworking projects. Specification: Material: Carbide Shank Diameter: 1/4" Blade Diameter: 1/2" Blade Length: 11.9mm, 20mm, 25mm (Optional) Package list: 1 x Router Bit Package List 1100% brand new and high quality. 2Made of carbide material, with high hardness and long service life. 3Work well with 1/4 inch electric trimmers or engraving machines. 4Suitable for slotting, engraving, cutting, milling of hardwood, cork, composite board, density board, chipboard, etc. 5Necessary tools for woodworking projects.