Abstract: A security apparatus for restricting the opening of a door in a frame consisting of lag bolts screwed into the frame near opposite edges of the door and a nylon belt fastened to each lag bolt. An aperture is formed near each end of the belt and the lag bolts are extended through the apertures in order to fasten the belt to the bolts. The belt can be elongated slightly, and it is preferred that the distance between the apertures is slightly less than the distance between the bolts. Any elongation above a specified amount requires substantially higher force than that required to elongate the belt for putting it in its operable position.