Sudoku is a game for the numerate (as the crossword puzzle is for the literate), a fascinating game everyone's playing, and it has only one rule: fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. This mechanical twist-action pencil will please any Sudoku player -- and maybe make a fan of you.
Mechanical Sudoku pencil takes a 1.1mm lead, comes with a set of refill erasers and measures 5 inches long.