The scor-it board is a 12" x 13" board with a non-slip surface so your paper stays flat, and rubber feet on the bottom so the board stays put on your work surface.  Scor-it has a centering ruler at the top, and a metal scoring ridge that runs straight down the center of the board.  You use a ridged tool made of purple heartwood to score the paper by moving the tool downward over the scoring ridge.