Which ice axes did Ueli Steck use on his speed ascent of the north face of the Eiger?

Which ice axes did Ueli Steck use on his speed ascent of the north face of the Eiger?

Alistair Whitaker's picture
By Alistair Whitaker | Jul 22nd 2015 |
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In some pictures it seems he is using Nomics but in others he is using quarks...