Rotring Rapid A3 Drawing Board (Part No 522475) made from unbreakable non-warping material. The L-system straightedge design allows drawing along the top edge of the straightedge right down to the bottom of the sheet, with full accuracy and stability. The guide have been rails designed for permanently smooth, straightedge movement. The item comes with a drawing head (Part No 522345) with automatic setting every 15 degrees and locking of any angle in between, plus freeswing setting. Contra-rotating 0-90 degree scale, brake mechanism to lock in position on straightedge.