Leather knives are now on sale.

A must-have knife for leather craftsmen to cut leather. As the name suggests, it is a knife that cuts the skin.
Cut the leather or rubber plate, etc., and cut along the line you drew while pressing the top of the grip with your thumb. The handle is just the right size to fit in your hand. Easy to apply force and suitable for long hours of work.

“ Leather (cutting) knife ” introduction here