The trimmer head itself is not standard (not for mounting with an M10L nut) and it will not work to replace it with a different type of head (for example, a metal spider type or a TH100U cartridge). You can only use the original one, but, as it turned out, it is made of rather soft and loose plastic, and if you cling to the ground and tiles of the tracks when mowing, it will be erased very quickly. Well, then just have time to change to new, original ones. Of course, I immediately bought a spare, but the operating costs become tangible. Therefore, I had to modify and add a steel support pad made of a 5 mm thick washer to the head. Now you can safely lean on the ground when mowing and not be afraid to gouge the head.
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