CALTROP

SN Blocks of concrete with four protruding arms so that, whichever way up the caltrop is placed, one arm will always point upward. Used in imitation of the iron caltrops thrown on the ground to impede cavalry.
CL MILITARY DEFENCE AND FORTIFICATION
BT ANTI TANK BLOCK

 
 

CALTROP

SN Blocks of concrete with four protruding arms so that, whichever way up the caltrop is placed, one arm will always point upward. Used in imitation of the iron caltrops thrown on the ground to impede cavalry.
CL MILITARY DEFENCE AND FORTIFICATION
BT ANTI TANK BLOCK