MusicNomad’s patent pending GRIP Bit peg winder attaches to any cordless power drill or power screwdriver. The innovative GRIP Technology smoothly and silently slips over your tuning pegs for a scratch free operation compared to traditional plastic peg winders. Its contoured design fits virtually all tuning pegs. It’s perfect for electric and acoustic guitar, bass, banjo, mandolin, ukulele and orchestral strings. Made from the highest quality materials, including a carbon steel shaft.