What is this part?

I recently bought a car radio + bluetooth system and it's volume potentiometer doesnt work. I opened it and found the broken potentiometer but I've no idea where I can find this or what is its name to search on electronic stores.

If you used this before and know where to find or know its name please let me know.

Thanks,
Tuncay

It looks like a rotatory encoder to me.

Grumpy_Mike:
It looks like a rotatory encoder to me.

You are right.. I found exact same part with this name and I learned a new component. Thanks for helping.

For future reference to others:

Wiki: Rotary encoder - Wikipedia
Item: Rotary Encoder - COM-09117 - SparkFun Electronics (I bought from ebay $7 for 10 Rotary Encoder for sale | eBay)
Arduino projects: