Abstract: The invention relates to fasteners adapted for use in automobile air bag attachment systems. The fastener comprises a hook to engage a vehicle structure during installation and a pin to lock the fastener in place. Advantageously, the hook portion may be quickly installed and will support the air bag assembly while allowing any positional adjustments to be made prior to locking the fastener by depressing the pin until it is fully engaged in the vehicle structure. An embodiment of the invention incorporates both a locking method to prevent the fastener from being disengaged and a method of releasing this lock if needed for servicing. Another aspect of the invention provides a method for reducing the likelihood of improperly installed parts by preventing locking when the fastener is in a partially installed configuration.