a bargaining chip

a bargaining chip

  (British, American & Australian) also a bargaining counter (British)
something that you can use to make someone do what you want The workers' strongest bargaining chip in the negotiations is the threat of strike action. Hostages were used as a bargaining counter during the seige.
See also: bargain, chip
References in periodicals archive ?
While Walton drove home the guild's intention of reaching a deal by its June 30 deadline, he barely kept open the option of a work action as a bargaining chip.