(ETCHED CLEAR AND ACCURATE)Machine divided 4R graduations - 8ths, 16ths, 32nds & 64ths. The combination square ruler scale is accurate, clear and easy to read, with level, marking needle. This woodworking workshop uses a beveled edged blade, roller knobs and fine adjustments. Each tick mark is laser engraved, so it is a laser engraving scale.(MEASUREMENT RANGE)Carpenter square is 0-180 degree measurement range with an accuracy of 5' / 0.08 degrees. Ideal for measuring the inside and outside corners of parts.(CONVENIENT & PRACTICAL)The nut fixed body can be separated, convenient and practical. Woodworking square with horizontal bubble is practical.(MATERIAL)Protractor square is fully hardened and tempered stainless steel blade, rustproof, durable, satin chrome finish. The tooth holder is made of high quality zinc alloy, which is durable.