I want to reiterate this .I repeat this doesn't fit the EGO battery operated trimmers. The trimmer has a built in mechanism that the line feeds into. A bolt is on the bottom and isn't meant to be removed. If you have any concerns or questions there's a few You Tube videos that will help you. I was able to use the trim line because I couldn't return it. So at least it wasn't a total loss. That's why I gave it two stars.
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