Staedtler drafting machine drawing board Mars Tecnico A3 size ST661-A3 A3 size:14.9 x 0.9 x 20.5 inches Convenient single-hand double locking mechanism for setting at any position on the rail Color indicator shows whether locked or unlocked Sheet clamping strips on both sides of the drawing board for fastening of paper Scale with needle hole for precise compass radius setting <a href="https://www.amazon.com/b?node=14770868011"> International products </a> have <a href="https://www.amazon.com/gp/help/customer/display.html/ref=nav_cs_help?ie=UTF8&amp;nodeId=202045290"> separate terms, </a> are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. Manufacturer warranty may not apply <a href="https://www.amazon.com/b?node=14770868011">Learn more</a> about Amazon Global Store.