This is a replacement caliper mounting bracket for Kodiak integral 10" rotor kit. The bracket will only work with the integrated style hub and rotors for Kodiak brake system, and will attach to the 4 hole mounting plate on your 3,500# axle.  This is Kodiaks part number CMB-10-I-DAC.  The brackets are dacromet coated to help prevent rust.  The bracket will work on either the left hand or right hand side of the trailer.  Kodiak offers a 3 year warranty on all of their dacromet coated parts.