Removing belt tensioner...What tool do I use?

[drewdowns]

I can't seem to find anything in my garage that fits this...Can anyone tell me what to look for?

This is a close up photo of the belt tensioner

http://i.imgur.com/43LfnjH.jpg

[RemoLexi]

Look below the pulley, there should be a 17mm on the arm that holds that pulley.

[drewdowns]

Look below the pulley, there should be a 17mm on the arm that holds that pulley.

Haha, thank you. I actually just figured that out :)