FEATUREThis Locking guitar tuning pegs is proven to hold strings tightly, allowing the guitar to stay in tune to improve playing enjoyment.Durable and highly reliable for easy, smooth and precise tuning.The locking tuners has a mechanical type locking system that can be used on any guitar, including non-tremolo or acoustic. Upgrade your tuners and improve the tuning accuracy and stability of your guitars.These are sealed locking tuners (machine heads). Fits for modern standard 10mm (0.39inches) peg holes.They are a 1:18 gear ratio for smooth turning. Locking tuners are in our experience great for providing maximum tuning stability.SPECIFICATIONMaterial: Zinc alloyGear material: CopperSize: As shown in the figureFinish: Black/SliverTotal weight: 220g / 7.68ozPACKAGE INCLUDE6 x Locking Machine Heads (6 Right)6 x Ferrules6 x Threaded bushings6 x ScrewsNOTEDue to manual measurement, please allow for an error of+-2mm.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you! 6pcs Right Locking Guitar String Tuning，machine heads, black gear ratio for 6R inline, for acoustic guitar accessories Size One Size Color Name Black Item Weight 1.76 ounces Item model number MAEPTLR Product Dimensions 0.39 x 0.39 x 0.39 inches