Pro-Draft Deluxe Adjustable Parallel Edge Board, 23" x 31" SKU - U-PEB2331K Size - 33.00" x 26.00" x 3.00" Smooth white scratch-proof melamine surface. Straightedge suitable for both ink and pencil. Locking knob secures vertical motion of straightedge. Large, easy to adjust knobs. Unique 5 angle Adjusto-Stand. Lightweight and handle makes it easy to transport. Angle adjustment varies with size of board. Larger boards will have a larger angle adjustment.