cram·pon 
(krămpŏn′, -pən)
(krămpŏn′, -pən)n. often crampons
1. A hinged pair of curved iron bars for raising heavy objects, such as stones or timber.
2. A framework of metal spikes strapped or clipped to the sole of a boot or shoe to prevent slipping when walking or climbing on ice and snow. Also called climbing iron.
[Middle English, from Old French, of Germanic origin.]
crampon