Changed brakes and rotors.

So for my 100k maintenence I changed brake pads... they still had so much meat but I was fine with that didn't change rotors at first.. then had grinding and squeeling.. I bought factory oem rotors squeeling and grinding went away... but the trick here is I bought the rotors from a lexus dealership they were a lot cheaper than all Toyota dealerships.. as a tip if you have the part number check lexus dealerships. Might save you 50 bucks like me.