Precision Rafter Square: The 12 inch carpenter square is made of aluminum alloy for rugged, durable aluminum construction and is made using unique CNC technology. The metric triangle ruler is of good quality and can be used many times without any damage. Accurate Scale: Adjustable speed square scale is calibrated by professional personnel before production, which is clear, visible and easy to read. The rafter square has a deep etching scale, which has excellent readability and can be used for a long time. The carpenter square uses both metric and English units, which can effectively increase work efficiency. Easy to Use: The rafter square measures angle and pitch and adjusts to the desired angle. The center lever can be adjusted and the nut tightened for precise positioning, a useful feature when making repetitive cuts, and comes with a conversion table for ease of use. Wide Applicable: Due to its multiple functions and strong stability, this carpenter square could be widely used in various work scenarios such as carpentry, architecture, drawing, painting, and sewing. Multifunctional use: The carpenter square can be used as a protractor, miter, scriber, saw guide, etc. which can meet your different needs in wood cutting, furniture decoration and work. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.