score:4
As with many items when it comes to hand luggage, they will not be listed in the instruction pages as it's impossible to make a closed-ended list.
Therefore, the security officers will fall back to the general rules of sharp items and decide on spot based on their judgement and familiarity with the object.
I can't say I have seen these clippers on-board before, but I think they will be allowed since items that look more "sharp" are already allowed.