I would say about 30% of rotors people bring in are turntable. If you can see they went metal to metal 99.9% aren't turntable, but I take out a mic and check them. Also, about 98% of drums are turntable.
-2001 Tahoe original 5.3 4x4 only 439k
-2001 Jincheng Panda(Honda Clone)
-1985 ATC70 with 125cc motor
-1973 CT70 with 125cc motor