A method, system and computer program product for generation and management of incremental backups of VEE file system using bitmaps. The side walls, the front wall, the rear wall and the top wall form top corners. A sensing device is further connected to the node, wherein the switch closes and opens to sample and store voltage signals transmitted on the bit line in the capacitive element. The invention provides a blind rivet nut capable of being used through one or several layers with improved grip capability and improved sealing ability preventing ingress of moisture.