Can I bring rock climbing gear such as
- climbing ropes
- nuts, hexes, cams, friends, etc. as described here
- a nut tool, as in the middle of this picture
- climbing chalk (Amazon example if you don't know what it is)
in my carry-on luggage in flights departing from Europe?
The internet refers mostly to US TSA rules, without a real consensus. While official rules seem to allow it, some suggest your bag will get additional attention and others report of items being refused, also in Europe.
In the extreme case of a complete climbing equipment, figure 1 or 2 ropes of 70m each, 15 quickdraws, harness, shoes, chalkbag, some carabiners and other tools plus nuts, hexes and friends.
Why would this be a problem (besides size and weight restrictions)? - Honestly I would look twice if I had 10kg of metal go through the scanner. Also the nut tool is somewhat similar to a blade and chalk is a white powder like cocaine.
Why am I asking this here? - On my next climbing vacation I might fly Ryanair and want to be a cheapo who does not check his stuff. Other persons have concerns about leaving equipment worth hundreds of $/€s in their checked luggage and prefer having it with them.
I am looking for answers that either base on personal experience or sources that can be checked.
(All images from wikimedia. Apologies for being the latest to ask a "can I bring [insert obscure item here] on a plane?")