Use Scor-it to make professional looking folds on the cards and envelopes you create.
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 to score the paper by moving the tool downward over the scoring ridge.
Scor-it also comes in a Mini size, great for traveling.
The video shown uses the old Scor-it Board. The new pink Scor-it-All board is basically the same, but is lighter and costs about $10 less.