A pair of petzl trigger rests (trig rest) for petzl axes - compatible with new style quarks, nomic or ergo.
One is new out of the packet, the other has a sliver of plastic shaved off the the inside of the extra finger rest that locks the grip rest into the orange ribbed bit on the inside of the new model quarks.
Note: they do NOT fit on the old style quarks.
I bought these from Outside a few weeks ago and just tried to fit them, hence why they are out of the packet. In the course of experimenting I shaved that thin sliver of plastic off of one. The other is pristine.
They cost me £15 each new, so for £15 plus £2.85 p&p you get both. And if they still work fine despite my best wittling skills then basically you got one for free! No returns and no refunds if you find that they don't fit your old model axes or have a bit of plastic shaved off!