Replacement set of 4 open gear machine tuners designed for 4string instruments. The 2L2R layout provides two tuners for the left side and two for the right side of the headstock, making this set suitable for ukuleles and other small 4string instruments that use machinestyle tuning pegs. The open gear design allows easy inspection and maintenance of the gears. Key benefits Precise string tuning: Machinestyle tuners provide reliable incremental adjustment for accurate pitch control while playing or retuning. Easy maintenance: Open gear construction exposes the gear teeth for quick lubrication and inspection to extend service life. Simple replacement or upgrade: Direct swap for worn or broken tuners on compatible 4string instruments without complex modification. Symmetrical 2L2R fit: Two left and two right tuners match common headstock layouts for ukuleles and similar small instruments. Versatile compatibility: Intended for 4string ukuleles and small guitars that accept machine tuners, making it a practical choice for repairs and builds. Product attributes Function: Machine tuning pegs for tightening and loosening strings to set pitch. Configuration: 2L2R, four tuners for 4string instruments. Mechanism: Open gear for visible gear engagement and straightforward maintenance. Use: Replacement, , or upgrade of tuning mechanisms on compatible instruments. Installation and performance notes Mount the set in place of existing tuners that accept machine heads in a 2L2R arrangement. Basic hand tools are sufficient for most installs. The open gear arrangement allows easy application of light lubricant to reduce wear and maintain smooth operation. Designed for steady, incremental string adjustment under normal playing conditions. Use scenarios a soprano or concert ukulele by replacing broken or slipping tuning pegs with this 2L2R open gear set to restore reliable tuning. Upgrade an older or vintagestyle ukulele that has worn friction pegs by installing machinestyle tuners for easier and more precise tuning. Fit tuners on a custombuilt 4string instrument or project ukulele where a clean, serviceable machine head layout is required. What to check before Confirm your instrument uses a machine head style tuner layout in a 2L2R arrangement. Verify hole and post dimensions on your headstock match the replacement tuners to ensure a proper fit. This tuner set provides a straightforward, maintainable option for replacing or upgrading the tuning hardware on 4string ukuleles and similar small instruments.