Knilling 4/4 size Perfection Planetary Geared Violin Peg Set with Synthetic Head Advanced engineering and materials,plus sealed gears for smooth, maintenance-free function and durability 4:1 gear reduction ensures easy and fast precision controlled tuning Look virtually identical to conventional pegs when installed for aesthetic appeal Easy to install, safe for the instrument and eliminates the need for fine tuners Terrific for olderplayers with arthritis or weakened grip