Carbide drilling insert is application for quarrying, tunneling, water well and construction, also in the paving, stone carving, such as the carbide tipped Grooving Tools, carbide ponted End Chisels, carbide tipped Shock chisels, carbide tipped Pitching Tools, carbide tipped Hammers, carbide tipped Lettering Chisels, carbide tipped Pheumatic Bushes are widely need the cemented tungsten carbide Bits.