Abstract: A device for preventing the removal of the glass pane of the non-slideable door or panel of a standard sliding glass assembly is disclosed. An elongated bent cylindrical member is adapted to be mounted on the non-slideable door frame on both the top and bottom of the exposed inner, vertical frame member in a non-removable fashion. This obstructs access to the frame screws. A bore is provided through the sill and into the surrounding material in such a way to receive the leg of the elongated cylindrical member. The leg tip is inserted in the bore hole and secured to the stationary door in a tamperproof manner such that any attempt to remove the panel frame screws would be obstructed by the cylindrical member.