Kodiaks replacement brake pad set is made out of high quality ceramic material. This set is NOT made out of semi-metallic material, which will rust over time leading to early brake pad deterioration on boat trailers that go in salt water. Kodiak is so confident in their ceramic brake pads that they offer a limited lifetime warranty. Fits Kodiak 225 calipers which is what is on 5 bolt and 6 bolt Kodiak brake kits. This is a full set that will replace the pads on 2 calipers/1 axle.