Visaboll anchor fixing into concrete foundations. Threaded tubes come flat packed into carrier moulding for ease of storage and transportation. Before installing into the excavated site the tubes are inserted through the sheet metal aligning plate then pushed into the moulded corner sockets. Concrete should come level with the top surface of the moulding. This system of fixing ensures a metal to metal contact throughout the securing line thus preventing the potential problems caused by plastic expansion and contraction.