Rear; Semi-Metallic; Ford Recommends When Servicing Brakes That The Wheel Bolts Be Changed As They Are One-Time Use, OE #W711141S442 X 5 w/ SRW, #W717146S439 X 6 w/ DRW; Also Recommended Are The Caliper Bolts As One-Time Use, OE #W500540S442 X 2 Per Caliper [Rear], Original Equipment Pad Material Is Low-Metallic