30CM ADJUSTABLE SET SQUARE – A large 30cm/12-inch set square, easily adjustable to a range of different angles from 0 to 90 degrees. ARCHITECTURE/TECHNICAL DRAWING – An integral tool for anyone needing to make accurate technical drawings. Ideal students and professionals in architecture, engineering, and other technical fields. DURABLE/QUALITY MATERIALS – Made from high quality acrylic plastic, bevelled edge, metal adjustment handle and accurately engraved distance markings in metric/centimetres, and 0 to 90-degree angles. PROTECTIVE CASE – Our adjustable set squares come in a convenient, strong grey protective case, storing, and protecting your equipment while on the move. ARTWAY TECHNICAL EQUIPMENT – As well as our 30cm/12-inch version, our adjustable set square also comes in a 20cm/8-inch version., Manufacturer: Artway