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Spencer Nugent's improved scissor design
The user now has 4 fingers pressing against the palm, which by my math is an advantage over the "scissor"-typical action of bringing the thumb to 1-3 other fingers.
the arms are to close so you can use only 2 finger phalanxes, only one arm is moving so no use for our strongest finger, the scissors have to have a spring so the moving arm will bounce back
How do you figure? This has the same mechanical advantage that a standard set would. I don't see a specific thumb position though so stability may be compromised.