A3 DRAWING BOARD: This Is a complete A3 Drawing tool set with a parallel motion which slides in a Groove. Made of high quality plastic, lightweight and durable, Ergonomic designedT-SQUARE AND TRIANGLE: The T-square straightedge slides up and down on a plastic runner,and maintains a nice 90 angle and can be locked into position on both sides of the board.With 12cm rotating ruler and 12cm triangle with angle attachment slide in a groove on the T-square, making it very easy to move back and forthPAPER LOCATOR AND TILT ANGLE FEET: There are paper clips on both sides of the board and with scale clamp on the bottom, to make the drawing process more accurate and stable. You can also attached the anti slip support legs to the back of the the board, find a comfortable drawing angleAPPLICABLE OCCASIONS:This drawing board is an indispensable tool for engineers, designers and engineering students, and also a perfect gift to your friendsPACKAGE LIST: Set Square, 2x Clamps, 1x Protractor, 2 Anti Slip Support Legs, 1x Sliding Ruler, 1x drawing pencil and lead core, all parts in picture included