Even the toughest steel blades eventually weaken with repeated hard use and sharpening. By replacing a worn or damaged blade with the Zenport QZ406-3 replacement cutting blade, your pruners will perform with the same excellence as a brand new tool. For use with QZ406, QZ412, QF6, QF12, compatible with Felco 6, Felco 12 and Felco 6CC model pruning shears. Blade matches Swiss industry standard models in design and performance.