These pads were a big disappointment, I changed a few and once fitted they fitted perfectly which is the only positive. After about 1000 miles they started to squeak (it wasn't a jam sensor) so I replaced my rotors (they were a little precautionary but good), no change in noise, the pads in the caliper looked ok but the squeaking noise went on so I replaced them and to my surprise all 4 sets were played out on the braking surface. Replace with Duralast and the noise goes away as expected.