Demonstrate Marking Knife Use

this style of pocket knife and I thought it'd be awesome to create a pocketk knife that has a marking knife in it. So, it's laminated blue paper steel, Japanese steel, so it's very tough. Hold this edge for a long time. And because it's a single bevel, you can get it right next to your square and it'll strike a nice square, straight line, >> very fine, beautiful line. And this is a marking gauge. So, if you want a continuous reference edge along something, so maybe your dovetail shoulder line or your motor shoulder