10 Finger Tap to Lock Screen not working.

Hello, I'm trying to setup 10 finger tap to lock the screen. It doesn't work. I only see option for "11 Finger Tap/Whole Hand". What does that mean? How can I tap with 11 fingers?

I tried using "11 Finger Tap/Whole Hand" option to trigger Lock Screen but basically using my 10 fingers to tap. It doesn't work. Did anyone had success using this '11 finger' gesture?