This is a replacement trailer disc brake caliper slide pin guide bolt which fits Kodiak trailer disc brake systems. The manufacturer's part number is DBC-MHGB. These slider pins are 100% Stainless Steel and will never rust. They come with thread locker pre-applied. The slider pins use either a 5/16 inch Allen wrench or a ½ inch socket. The thread size is M 11 x 1.5. This slider pin will fit Kodiaks disc brake sets 3,500lb through 7,200lb. (225 calipers and 250 calipers) this is the mounting bolt that bolts your Kodiak Brake Caliper to your Kodiak Caliper Bracket, you need 2 of these pins per caliper.