Planetary Perfection Pegs were invented to prevent the problem of slipping or stuck pegs. These innovative pegs save time on tuning and increase the musical potential of your instrument. Perfection Pegs are now used by players of all levels--from students to concert halls. They are available in a variety of diameters to best fit your instrument. Choose the head material (synthetic, ebony, or rosewood) to best suit your budget and match your instrument.