For Use on Narrow Windows From Truth Manufacturing The "Entrygard" Dyad Casement Operator is designed for use on windows that are too narrow to accept the EntryGard Dual Arm Operator. This operator can be used on windows as narrow as 11 inches (279.4 millimeters) between stops, (9 inches (228.6 millimeters) between stops if less than 90º of opening is acceptable). The result is excellent low-torque operation on narrow casement windows through a full 90º of opening. The "EntryGard" Dyad Operator also adapts to an awning window application when mounted to the side jamb. Minimum Order: 1 Package One operator per package