Round grippy tuning keys.
They cost the same as any other tuning key shape to produce, but they offer much more comfort and precision than the industry standard flat, wide, smooth shape.
Even if you're not trying to appeal to the traditionalist, you think these things would be on every uber modern overengineered guitar on the market.
I just bought like 3 dozen of these things to put on my guitars as soon as I realized how great they feel. Seriously, if you try them you won't go back.
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