be bionic steeper Technical Manual page 10

Grips
2.5 Non-Opposed - Thumb is parallel with the fingers
10
Key
In the non-opposed thumb position, the four fingers partially
close. The thumb then closes onto the side of the index finger.
The thumb position may be raised and lowered without moving
the other four fingers allowing for release, capture or reposition
of the object being gripped. This pattern is ideal for carrying
paper or letters, using a spoon and for holding a thin flat object
such as a plate, a credit card or a key.
Finger Point
With the thumb in the non-opposed setting, the user can move
to Finger Point position. The middle, ring, and little fingers
close against the palm and the thumb moves against the
middle finger. With this grip, typing on a keyboard or input pad,
pressing a bell or a button can be achieved.
Open Palm
With the thumb in the non-opposed position the hand may be
fully opened to provide a flat palm suitable for carrying a tray or
a plate.