Our A3 drawing board is very lightweight and durable which is made of high quality plastic. This item has a drafting head-lock mechanism for straightedge and free-swing setting which comes with 2 parallel rulers and 2 corner clips. Our drawing board makes the drawing process accurate and stable with its easy features and comfortable working position. A great tool for designer with double locking parallel rule featuring a push button release and additional lock on the right side. This item has automatic 15” indexing/ locking with separate locking mechanism for intermediate degrees. With paper clips on both sides of the board and a couple of feet you can attach to the back that elevates the back of the board just a bit for a comfortable working position and slides left and right along rule and can be locked into any position. We highly recommend this durable, accurate and light weight A3 technical drawing and drafting board.