Assertion: crampon's crampon | /r/MadeOf | steel
Facets:
Source sentences:
text: Crampons are made of steel, stainless steel or aluminum.
text: Modern crampons are made of steel, aluminum alloys or, more rarely, titanium alloys.
text: Crampons are made of steel or aluminium and have spikes which cut into the ice, thus ensuring good traction.