For 2014 RAV4, the original OEM pads caused strange noise and vibration as pushing a little harder. But it's about 0.2 inch pads remained. The small pc of leading metal is not enclosed. Just move this leading metal piece from the old pads to the new. Don't how they wear out.
Pros: quiet, precise, better than the original OEM. Thick enough to greatly reduce the null gap of brake pedal. Cons: missing leading metal piece.