This pair of bracers can contain a concealed dagger within each bracer. The wearer can cause the dagger within one, or both, bracers to extend from the bracer, to their hand, where it is useable as a weapon (as a standard dagger). The daggers can also be retracted back into the bracers, where they are again hidden.
Extending or retracting the daggers requires the use of a Bonus Action from the wearer. One bonus action can be used to extend or retract both weapons.
Whilst retracted, these daggers cannot be seen by anyone else unless they examine the bracers and succeed at an Intelligence (Investigation) check DC:20.
The concealed daggers can be replaced by the user, with any other dagger, including magical ones. Doing so takes 5 minutes of effort.