Made of CNC machined anodized aluminum alloy. Features easy-to-read engraved scale. Great for crown molding, trim work, pipes, and a variety of other woodworking applications. Internal O-ring mechanism rotates during operation, ensuring smooth and precise reading on inside/outside corners. Two scales transmit your working angles directly to the miter saw for precise bevel and single cuts. Aluminum alloy is stronger and 't bend like plastic., Manufacturer: Akfldms