This is a good product for the space saving, but actually the string breaks By cons is repaired, you can remove the tout..il simply unscrew some screws starting with the 4 that are hidden by small white plastic end below the cover. Must force with the tip of a knife to dislodge .. then it is rather easy few screws and we end up with twine. Must buy another of course. 2 EUR 10M. For the wire in the green handle, simply peel off the 2 parts of the handle gently with a knife that cuts well (opinel style) to gently open and bring out the best the fil..puis and put the new pick to superclue .. simple ... but take your time