The Navigator’s Pencil Set includes a nautical pencil one 12-pack of leads and 2 erasers (as shown). 0.7 mm lead (HB or No. 2 hardness) is a special blend of polymers that provides extra blackness and smoothness when writing or drawing.The Navigator’s Pencil Set includes a nautical pencil that is great for charting out courses because the super fine eraser won t mar charts when making corrections and the precise lead of the nautical pencil will give a clear course line. The eraser oof the nautical pencil adjusts out as it wears down similar to the way the lead adjusts on writing tip.