It’s a wind up. And I thought a pretty funny one. Not his first either.
Good work fella
http://singletrackworld.com/forum/topic/front-mech-tensioning-device
er… excuse me, just for the record, that’s real!
you might think it’s a leg-puller if you got the wrong end of the stick and think it’s to be left in there while riding. It’s only for use while fettling. But it’s a genuine tool that comes with mechs and I posted it in response to someone asking about it.