S.C. Code § 14-7-1050
In the trial of all actions at law in the courts of common pleas and issues ordered to be framed by the judge in equity cases in the courts, the clerk in the manner provided by Section 14-7-1060 shall furnish the parties or their attorneys with a list of twenty jurors from the whole number of jurors who are in attendance, the names on the list to be numbered from one to twenty, and be stricken off by numbers in the same manner as the regular panels of jurors in those courts have been formed. From this list the parties or their attorneys shall alternatively strike, until there are but twelve left, which shall constitute the jury to try the case or issue. In all cases the plaintiff shall have the first strike and in all civil cases any party shall have the right to demand a panel of twenty competent and impartial jurors from which to strike a jury.
S.C. Code § 14-7-1050