Knuckle-Joint
Finger Movement Symbols

twenty	boy	Knuckle-Joint Hinges Shut When the knuckle-joint of the finger closes like a hinge of a door (bends down or in), it is written with a small arrow that points down. One arrow pointing down means "close once". Two arrows pointing down mean "close twice".
send	send-send	Knuckle-Joint Hinges Open When the knuckle-joint of the finger opens like the hinge of a door (bends up or out), it is written with a small arrow that points up. One arrow pointing up means "open once". Two arrows pointing up mean "open twice".