 Also, booby traps can be non-explosive devices such as the punji stick.Overlapping both categories is the "improvised explosive device" (IED), which is "a device placed or fabricated in an improvised manner incorporating explosive material, destructive, lethal, noxious, incendiary, pyrotechnic materials or chemicals designed to destroy, disfigure, distract or harass.They may incorporate military stores, but are normally devised from non-military components."