Trained Hand (from patch notes).

[Caimie_Tsukino]

To be frank, whether it's 80% or 90% success rate, one should ALWAYS use Steady Hand II or Steady Hand for Trained Hand. It's a freaking 32 CP skill (even bigger CP investment than PBP), and you simply CANNOT risk a failure.

If the Trained Hand is available while SH II isn't active, using SH II will actually give it a chance to bait for a Good.

What is trained hand?

A Specialist Action.