Hi, I have Work S1's 3pc wheels. I wanna take apart the face from the lip but I dont have the correct sized socket. I was thinking that it might possibly be a key that WORK sells? If not, what size socket do I need for the bolt/rivvets connecting the face/center to the lip? really need help here. I need to refinish my rims.

 

Post a pic of the rivet so people know what it looks like.