 In this case, on this 10 Lincoln MKZ, it's a blind hole. It's dry. So it was actually physically rust. There was rust powder. It was rusted into the case. Then the problem became, you know, we need a knuckle. Now, you know, 2010 Lincoln MKZs were made a while ago. But let me take you in the shop courtesy of AutoZone and tell you how I found this.