The PMA-3 is a Yugoslavian blast resistant minimum metal anti-personnel mine.
It is circular, consisting of a plastic upper and lower half joined together by a rubber cover.
The tilting drives a pin through a friction sensitive pyrotechnic compound, which fires the detonator and then the main explosive charge.
Its blast resistance combined with the lack of metal in the mine make it extremely difficult to clear.
PMA-3 mines can be found in minefields in Albania, Bosnia, Cambodia, Chad, Chile, Croatia, Serbia, Lebanon, Namibia and Peru.