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Nendo Reshapes the Key
If torque is ever an issue turning a key, you'll most likely be breaking it off.
From a physics perspective, it doesn't actually provide any mechanical advantage: with a standard key, I can provide force on either side of the lever arm, so torque T = (2*F)*d. With their design, I can provide the same force on one side of a lever arm twice as long, T = F*(2*d). Same difference.
I get the accessibility benefit though, that's nice.
This guy physics...
well that's actually pretty interesting.....
Quite a few vintage VW keys have an asymmetrical "handle." Many examples here: https://www.wolfsburgwest.com/wolfsburg_new/door_components/door_keys.cfm?type=2
also, there might be less material waste from manufacturing. I suspect this shape [edit]
My Kubota tractor key is L-shaped and works great for the reasons listed here.