The marking are permanently laser etched for longevity and very easy to see. A convenient conversion table is printed on the back of the square, and also functions as a 0°-90° protractor scale. *Square comes in 7″ and 12″ Versions คุณสมบัติ: ANODIZED ➤ Resists wear and corrosion INCREMENTS ➤ 1/8”, Degrees VISIBLE ➤ Permanent laser etched markings EASY ➤ Functions as a 0°-90° protractor scale CONVENIENT ➤ Handy conversion table on back
