About this item Replace CMEED400 EB-007 Compatible with CRAFTSMAN 7.5-in Push Walk Behind Electric Lawn Edger Measurements: Length 7 3/4″, Center Hole 1/2″, Width 2 3/4″, Thickness 0.090″ Installation steps: 1. Wait for the blade to stop completely and unplug the tool. 2. Use a 1″ wrench on the outer washer to secure the blade to prevent rotation and loosen the hex nut. 3. Replace the blade and washer with the newly supplied blade and washer 4. Place the washer on the shaft, the gasket hole must mesh with the scum on the shaft 5. Place the blade on the shaft. 6. Place the second washer on the shaft on the blade and align the plane in the washer with the plane on the shaft. 7. Install the hex nut and tighten it