Knife. Small, hand-held, single- or double-edged cutting instrument, usually made of flint or metal.See Tools.
Penknife. Iron tool used to sharpen reed pens, cut papyrus, and carve letters in stone. It is mentioned by name only in Jeremiah 36:23, but referred to elsewhere as a pen or tool of iron (Jb 19:24; Jer 17:1). Another reference may be found in Isaiah 8:1 (kjv “a man’s pen,” rsv “in common characters,”