Belt Buddy with Universal Offset Adjustment Arm (UAA2) Belt Buddy Kit; Includes the Universal Adjustment Arm (UAA2) with a 1/2' offset for mounting applications which require an offset to the alternator and Belt Buddy Mechanism (BB). To utilize only the adjustment mechanism with an existing adjustment arm, purchase part number BBU. Caution:  This approach sacrifices some 'travel' in the existing adjustment arm so the BBU mechanism can be anchored to the arm.  Make certain your alternator mounting does not need this travel before purchasing the BBU. This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.