Stihl Grass Trimmer Line Feed Hand Wrench

Used to wind in the line on a Stihl Grass Trimmer fitted with the autocut mowing head simillar to that found here: https://static.stihl.com/upload/assetmanager/modell_imagefilename/scaled/zoomreiter/d6de1544589e4d68b851813d7ac141c7.jpg.

I designed this because when you are trying to wind the line in, and all you can use is your finger tips, it can get very hard to do, especially if you've been holding a vibrating grass trimmer for the last 30 minutes and your finger tips are still shaking. Th