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 36 inch. (Suggestion: Consider a straightedge about 6" shorter that your table to allow for other materials, etc).
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