An EAS system alarm tag is provided with two or more straps that enable secure and reliable simultaneous engagement of the tag with one or more articles that are detachably coupled at an angle. An interlock actuator switch enables the two or more straps to interlock within a housing of the alarm tag. An auxiliary actuator switch enables detection of separation of the alarm tag from one or more articles with which the alarm tag is coupled. When both the interlock actuator switch and the auxiliary actuator switch are set to a first condition, an alarm system of the alarm tag is armed and set to ON; and when the interlock actuator switch is set to the first condition and the auxiliary actuator switch is set to a second condition while the alarm tag is armed and ON, the alarm system of the alarm tag triggers an alarm.