Abstract: An escapable guard system includes means for securance of a grill having at each side thereof to be attached to a window frame or the like a channel with legs outturned; for co-acting with channels of this type a self-protective fastening system is provided which on unlocking provides instant full access to the window opening; the fastening system includes for one side of such a grill an angled guard latch which fits within a channel where it is secured by carriage bolts passing through respective square holes in the channel and into square holes in base members of this invention which the square under-portion of each rounded head of the carriage bolt type machine screw fits, leaving exposed only the featureless semi-spherical portion of the bolt head; this guard latch co-acts with a frame latch which covers the nuts on the carriage bolts when attached to a window frame and which can be locked to the guard latch by a padlock; for the other side of such a grill similarly secured hinge hooks are provided which