Bose AMM108 U-bracketThe Bose Professional AMM108 U Bracket allows for versatile mounting of a single AMM108 loudspeaker with ample rotation to accommodate various pitch angles. The structural rigidity of the bracket allows either two point attachment to flat surfaces such as walls or ceilings, or single point attachment via the center mounting hole to secondary support structures such as third party lighting pole mounting kits or truss. The bracket fits the M10 x 20 mm