iGaging 4´´ Precision Double Square
|In addition to routine measuring and layout, this apron-size square is perfect for machine setups. Just slide the ruler to the end for a precision height gauge. Features 1/8"e and 1/16"e graduations on one side, while the flip-side has 1/32"e and 1/64"e graduations.
Only $19.99 at Rockler.com