With the FLY084 metal replacement blade, keep your lawn looking healthy and your lawnmower in top condition. Over time, dirt and other garden debris can erode the blade, causing the metal to weaken and become paper thin. It you notice this, you should replace the blade immediately. Metal blades should be checked regularly for signs of wear, damage and balance. A blunt blade will harm the grass - an out of balance blade will harm the lawnmower so ensure proper cutting performance from your lawnmower with this replacement blade. This 34cm blade is compatible with the Flymo EasiStore 340R Li Lawnmower