Answer: PEEPHOLES

AnswerCrossword Clue
PEEPHOLESApartment security devices
PEEPHOLESOpenings for spies
PEEPHOLESSpying apertures
PEEPHOLESDoor features
PEEPHOLESViewpoints?
PEEPHOLESSpy rings?
PEEPHOLESFeatures of most hotel doors
peepholesPEEPHOLE, a small opening through which one may look
peepholesA small hole that may be looked through, esp. one in a door through which visitors may be identified before the door is opened