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Set of 4R Bass Machine Heads Fit for Right Handed 4-String Bass.

Feature a 1:19 gear ratio for tuning up quickly and accurately, smooth work.

Open gear, heavy-duty internal gear.

Guitar tuning pins have a very smooth mechanism without any gaps, delays and slack, using these tuning pins you can quickly and accurately tune your guitar strings.

Easy to install, not too tight, not too loose, it can be fixed perfectly. Made of high quality materials with heavy duty internal gears. The ideal replacement for your guitar tuning keys.