A mace was a club or virge with a metal head to deliver heavy blows.
Clara Oswald tried a mace on a Weapons-Grade Cyberman, but failed due to its strength being enhanced by its cybernetic limbs. (TV: Nightmare in Silver)
Carys Fletcher under the influence of the hormone gas used a mace to melee clash with Jack Harkness's bokken. (TV: Day One [+])