ZBrushCentral

can't find brush again

Hello, a few days ago I was checking out all the new brushes and swore I saw one that makes a certain cut, like a undercut, but now i cannot find it again, was it only in 3.5 and taken out for release2?
The stroke looked like this if it was in profile view, it cut on both sides.

Attachments

whichbrush.jpg