I really have no idea of when I would actually need to use this but for some strange reason I want to order them.
http://www.amazon.com/s/?_encoding=UTF8&camp=1789&creative=390957&field-keywords=caltrops&linkCode=ur2&rh=i%3Aaps%2Ck%3Acaltrops&tag=dietry-20&url=search-alias%3Daps&linkId=PFPDSIKQ33JFXTIZ
http://www.amazon.com/s/?_encoding=UTF8&camp=1789&creative=390957&field-keywords=caltrops&linkCode=ur2&rh=i%3Aaps%2Ck%3Acaltrops&tag=dietry-20&url=search-alias%3Daps&linkId=PFPDSIKQ33JFXTIZ