Iron caltrop with the normal four spikes.
caltrop British Museum
Monogrammist G.A. & the Caltrop, Composite capital with measurements
European Furniture in The Metropolitan Museum of Art. — New York ; New Haven and London, 2006
BigLee's 'Miniature Adventures': The Royal Engineers Museum, Chatham
Caltrops - Encyclopedia of Greater Philadelphia
Caltrop hi-res stock photography and images - Page 7 - Alamy
A guide to the fossil invertebrate animals in the Department of geology and palaeontology in the British museum (Natural history) . is elongated,forming a shaft from which the other rays project as
CALTROP - EARLY 18TH CENTURY - SWEDEN ABOUT 1718 - FOUND IN THE LAST KAROLINER BATTLE NEAR THE BORDER OF NORWAY - Global War Museum i Munkedal
War elephant - Wikipedia
Herefordshire Museum Service - Dodecahedron (L217) Called a dodecahedron because of its twelve sides, this Roman object is one of only a handful of its kind found in Britain. It was found
16 Caltrops Icons - Free in SVG, PNG, ICO - IconScout
Category:Caltrops (weapon) - Wikimedia Commons
C 1775 Revolutionary War Hand Made Caltrop/spike
Roman Bronze Caltrop (cruel Anti Personnel Device)
Caltrop