The (AB) Angle Brackets are part of RCI
Angle Bracket for 8371, 1-1/2 In. x 2 In. x 9-3/8 In., Dark Bronze
Brushed Anodized Aluminum (28) or Brushed Anodized Dark Bronze (40).
Angle Brackets for narrow aluminum frames or center-hung single-acting doors, when inadequate space is left for mounting .
For use in: Interior or Perimeter Doors; Access Control; Loss Prevention Traffic Control