Specification Brand : Zhrmzhg BulletPoint1 : (Precision Gear System):High-precision gear ratio ensures smooth and accurate tuning with stable pitch retention. BulletPoint2 : (Tuning Stability):Reinforced shaft and gear engagement minimize string slippage, ideal for live performances. BulletPoint3 : (Universal Compatibility):Fits electric/acoustic guitars, bass guitars, and other string instruments with standard sizing. BulletPoint4 : (Ergonomic Design):Textured or vintage-style knobs provide non slip grip and enhance instrument aesthetics. BulletPoint5 : (High-Quality Material):Made from durable metal alloy (e.g., zinc alloy/stainless steel), corrosion-resistant and long-lasting for stable tuning performance. BulletPoint6 : 【EASY TO INSTALL】 Guitar tuning keys set with 3 left and 3 right machine heads, and comes with wrench and screwdriver, which is easy to install Color : Black copper ExternallyAssignedProductIdentifier1 : 791986857459 ExternallyAssignedProductIdentifier2 : 0791986857459 FinishType : Polished GpsrSafetyAttestation : 1 IncludedComponents : Tuner ×6 (3x L + 3R), screws ×6, nuts x6, gaskets x6, hex wrench ×1, small screwdriver 1x ItemName : 6PCS(3L+3R) Guitar Machine Heads Knobs Guitar String Tuning Pegs Machine Head Tuners for Electric or Acoustic Guitar For replacement and upgrade ItemPackageDimensions_Height : 1.4 inches ItemPackageDimensions_Length : 5.5 inches ItemPackageDimensions_Width : 4.1 inches ItemPackageQuantity : 1 ItemTypeKeyword : tuning-devices Manufacturer : Origin of music Material : Alloy Steel ModelName : Guitar Tuners ModelNumber : GT-001 NumberOfBoxes : 1 NumberOfItems : 26 PartNumber : GT006 ProductDescription : Professional-Grade Tuning Performance ✅ Enclosed Locking System Fully sealed housing protects gears from dust/humidity, 3x longer lifespan than open-gear tuners. Patented string-lock mechanism replaces manual winding, ensures 60% more even tension distribution for rock-solid tuning stability. ✅ Universal Fit & Heavy-Duty Build Pre-configured 3L3R (3 Left + 3 Right) layout fits most acoustic (Dreadnought, Jumbo) & electric guitars (Strat, LP, etc.). Zinc alloy body + hardened steel gears withstand heavy string tension (0.10-0.52 gauges), ideal for stage and studio use. ✅ Precision Redefined 15:1 gear ratio delivers ±0.5 cent accuracy per turn, achieve perfect intonation in seconds. Knurled knob grips prevent slippage even with sweaty hands, built for live performances. Specifications Materials: Zinc Alloy (Body) + Hardened Steel (Gears) + ABS Polymer (Knobs) Gear Ratio: 15:1 String Compatibility: 0.10-0.52 (Acoustic & Electric Guitars) Package: Tuner ×6 (3x on the left + 3x on the right), screws ×6, nuts x6, gaskets x6, hex wrench ×1, small screwdriver 1x ProductSiteLaunchDate : 2025-04-17T09:42:26.710Z SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 1 UnspscCode : 60131500 WarrantyDescription : If you have any problem with the product, please contact me and i will solve the problem for you as soon as possible.