Pro-draft Par. Straightedge 48"

The Martin Pro-draft Professional Parallel Straightedge is
cutting edge technology. A short list of the Pro-Draft's
features include: Aluminum body for strength and stability,
Anti-warp cast acrylic bottom with ink edges, locking device
to lock in any angle that you would like to draw, and anti-static
rollers to avoid smudges to your drawing. Size 48 inch. (Suggestion: Consider a straightedge about 6" shorter that your table to allow for other materials, etc)