Razor wire ndi mtundu wazinthu zachitetezo zomwe zimadziwika padziko lonse lapansi.Amatchedwanso waya wa concertina kapena tepi waminga chifukwa cha mawonekedwe ake.Amakhala ndi masamba akuthwa ndi mawaya achitsulo amkati.Amagwiritsidwa ntchito kwambiri mufakitale, ndende, banki, madera amchere, malire kapena malo ena kuti aletse kulowa mosaloledwa kwachitetezo ndi chitetezo.