To replace the blade, place your thumb under the bottom foil and push upwards to remove the blade.
To insert the blade again, position it in its seat and press down to hear a click.
Keep the release button on the side of the extension pressed and open the extension completely until you hear it
a slight click. (Figure 2)
Open the hook: to open the hook press with your thumb in the direction of the arrow and lift. (Fig.3)
Place the product in the appropriate housing located at the top of the extension.