Two options: metric and imperial, optional. Features a tuning fork scale of 0-90°. Use as a saw guide for measuring angles and cuts, ideal for all construction and remodeling projects. Torch T6 / .High precision: its thick edge can be used directly with the saw against the square for transverse or angular cuts using the engraved protractor scale, allowing the cutting lines to be quickly and precisely marked on the currents. The rafter square has ladders for cutting hip and valle beams.Scope of application: 26 x 18.6 x 18.5cm. Suitable for all construction and remodeling projects, including hobbyists, builders, producers and artists. 3 meters framing frame and ruler, ideal for all construction and renovation projects.【High Quality】 The framing frame is made of high quality aluminum alloy with a matte black finish to prevent glare, corrosion and durability, not easy to broken. Note: The data are all manual measurement, please allow 1-3cm error, due to the light and display difference, it there will be some color difference, depending on the physical item received.