Black Hole/ TrouNoir/ Schwarzes Loch

Black hole is a unique experience to get a hollow place in the blade´s body just above the cutting edge.
The blade is composed of 750 layers pure iron+15n20 on a SC145 core with 1,45% Carbon. The cutting edge length is 215mm the width is 50mm.
This is a very thin blade meant to cut mainly into meat.