it's simple, ball bearing inside the allen bolt prevent allen key from getting inside, it's nigh on impossible to try and undo the bolt with a ball bearing inside as well as being impossible to take out (using the right glue).
@edscoble started
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it's simple, ball bearing inside the allen bolt prevent allen key from getting inside, it's nigh on impossible to try and undo the bolt with a ball bearing inside as well as being impossible to take out (using the right glue).