Dimensions: 7.1 x 7.1 inches (18 x 18 cm); Color: Black; Gradation: 0.04 inch (1 mm) (angle); Material: Aluminum alloy; Perforation (both sides): 0.4 inch (9 mm); Applications: For use with injury tools, circular saw guides, drilling guides, drill stands, two-by-fors, and wood cutting (can be cut 90 degrees and 45 degrees). Small enough to give you great recovery. For small cuts and work points. Cut out 90 and 45 degrees A handy ruler for cutting right angle wood Both sides of the piercing can be used right or left hand, flipped over or cut 45°. In addition, it is a ruler that can be held together with the material.