Key

  a key in pale, wards in chief    

 The position of the key should be blazoned to indicate whether the ward points to chief or to base, and to the  dexter or sinister. When in saltire, as in the emblem of St Peter, the wards are shown upwards and outwards.

two key, wards in chief, interlaced in the bows and endorsed in bend, interlacing a sword in bend sinister