Repair broken windows with this Entrygard Dual Arm Left-Hand Casement Window Operator with Stud Bracket replacement part. The patented dual arm action offers almost effortless operation. This casement window operator is for left hand windows only. Installation is quick and easy, and all fasteners are included. A better opening window is well within reach! Casement window operator components include: high pressure diecast zinc operator base; steel arms and stud bracket; hardened steel worm drive and gears; all raw metal parts are protected with the corrosive resistant E-Gard coating process; pate. Made of zinc diecast with a steel arm and corrosive resistant finish, this window replacement part resists rust and corrosion and is made to last.