Is this worth fixing?

[callegro]

View attachment ImageUploadedByPiper Forum1451535963.261460.jpg

So this was in my 180D when I bought it. I've messed around with it a few times, but it's a little jenky. The knob is loose and it seems to not hold level on anything and goes into a slight bank. Don't have the manual for it, and a little unsure what it's exactly called. Not sure what it's coupled to either. Help needed!

Thanks guys

 

[sanjiv]

 

[Flying_Monkey]

 

[callegro]

 

[sanjiv]

 

[rrc1962]

 

[JimC]

 

[callegro]

 

[JimC]