About the product:1. Package Included: 6pcs (3*for right hand + 3*for left hand) locking guitar tuner pegs, 6 mounting screws, 6 threaded bushings and 6 ferrules, can replace almost any electric or acoustic guitar.2. The guitar locking tuner is equipped with heavy duty internal gears, sturdy and convenient.3. Made of zinc alloy material, durable. Easy to install, easy to replace old and dirty guitar tuning pegs.4. The locking tuners help provide finer tuning and greater stability.5. Gear Ratio - 1:18, designed to fit modern 10mm headstock hole.Description:Replacement/upgrade parts for electric, folk or acoustic guitars or precision instruments.Gear Ratio - 1:18, designed to fit modern 10mm headstock hole.Hexagonal buttons with sealed housing and 45 degree fixing tabs.Durable and highly reliable for easy, smooth and precise tuning.Made of sturdy materials, it looks elegant and professional.Easy to install, quick and accurate tuning.Equipped with heavy-duty internal gears.Provides finer tuning and greater stability.Premium sealed guitar machine head.