Casement Window Operator Part - Stud Brackets are "handed" and Sold Only Service Sets Consisting of (2) Left and (2) Right Handing Units. Stamped steel bracket with grooved attachment stud. Baked enamel finish for corrosion resistance. Bracket mounts to bottom of sash for attachment to the short dyad arm of operators for proper and smooth operation of the sash. NOTE: There are several styles so please review before ordering.