here is a tool I use to make every knife . it's a heavy duty scribe built to last . it's made from cold rolled steel 3" long x 1-1/2" wide and 7/8 thick . the handle is 2" long to easily tighten the scribe into place . it has an adjustment nut on the back to easily set the proper center line .
knife scribe super heavy duty center line scribe ,overbuilt tank of a scribe tungsten carbide scribe .