Residential security doors also known as rolling shutters or storm shutters are a great way to secure your home in an aesthetically pleasing way. Custom built to fit your home, the doors are exterior mounted but operated from inside. Great noise barrier and insulation qualities. Door operators can be via tape winch, cable winch, crank rod or electric motor. High quality torsion springs mounted within the axle ensure proper counter balance for manual push up / pull down operation.