Premium Materials: The set square is made of high quality aluminium alloy with blue matte finish to prevent glare. Good oxidation resistance, corrosion resistant and durable, not easy to break like a plastic. And the cast aluminium body is with a clear and precise scale Practical and durable: The speed square has high-quality mitre angle is with a length of 18 cm (7 inches), use the pivot point, the protractor and the straight for your angle measurements, then the stop and the marking gauge help you tear off straights Multifunctional design: The metric triangle ruler can be used as a protractor, mitre, line saw guide, frame square and ruler and is mainly used in the wood processing and decoration industry, DIY etc Precise measurements: The conversion table cm/inch simplifies your work and offers you a versatile level. This protractor allows for faster measuring and marking of angles, it facilitates effective measurement with precision. That's why it is ideal for both professionals and enthusiastic DIY enthusiasts Easy to use: The multifunctional carpenters square can quickly measure or mark an angle of 0 to 90 degrees with simple operation, which saves a lot of time in your woodworking