A peg turner for a stringed instrument comprises an elongate body portion extending along an axis. The body portion defines first and second opposing ends. A recess is formed in the first end of the body portion, and a tapered peg turner slot is formed in the recess. The tapered peg turner slot comprises an opening at the first end of the body portion, sized to accept a tuning peg of a string instrument. Tapered sides extend from the opening along the rotational axis toward the second end of the body portion, tapering inward to form a compressive coupling for turning the selected peg about the axis with the body portion of the peg turner.