HSS Square Graver Jewelers Watchmakers Engraver Tool 3 This is a new #3 high speed steel square graver Square gravers are used for bold letter engraving Gravers made of high speed steel are harder to sharpen but hold and edge 4 to 5 times longer This can be used on all types of metals, wood, bone, ivory, onyx, etc Used by engravers, jewelers, die sinkers, stone setters and watchmakers