4-7/16" Casement Window Dual Arm Operator Compatible with Marvin and Truth Entrygard OEM Part #20810, 15 Series Dual Arm Window Crank TH 23076 Replacement, Left Hand

["Left Hand. This casement window operator is for left hand windows only. Handing is determined by the side the hinge is on, as viewed from Outside.","15.10 Dual Arm Casement Operator compatible with Marvin, Bilt Best, Windsor, Vetter, Pozzi, Shelter & other wood casement windows.","Long Arm Length: 10-1/2\" (center of operator to center of button); Short Arm Length: 4-7/16\" (offset link - UP).","Dual arm action pushes the sash open while pulling the hinge side of the sash to the open position.","When properly installed this operator results in almost effortless operation of casement windows."]