Feature: 1. Made of high-quality stainless steel, very light and easy to carry. 2. Smooth surface, convenient to use, easy to read. 3. 0-180 degree arbitrary rotation. 4. Adjustable screw design, easy operation for fixed reading. 5. Suitable for painting, measure, homework, and technical drawing. 6. ? Made of high-quality stainless steel, very light and easy to carry. 7. ? Smooth surface, convenient to use, easy to read. 8. ? 0-180 degree arbitrary rotation. 9. ? Adjustable screw design, easy operation for fixed reading. 10. ? Suitable for painting, measure, homework, and technical drawing. Specification: The protractors can be applied for home and office using, students and craftsman. The black numbers are clear and easy to identify, adjustable angle and screw, then you can read quickly with accuracy. Features: Made of high-quality stainless steel, very light and easy to carry. Smooth surface, convenient to use, easy to read. 0-180 degree arbitrary rotation. Adjustable screw design, easy operation for fixed reading. Suitable for painting, measure, homework, and technical drawing. Specifications: Material: Stainless Steel Color: Silver Style: 3 styles (optional) 1#: One arm, 145mm / 5.71in 2#: One arm, 195mm / 7.68in 3#: Double arms, 300mm / 11.81in Item Size: 1#: 198 * 45mm / 7.8 * 1.77in 2#: 250 * 45mm / 9.84 * 1.77in 3#: 365 * 90mm / 14.37 * 3.54in Package Weight: 1#: 80g / 2.82ounces 2#: 100g / 3.53ounces 3#: 170g / 6ounces Package Size: 1#: 255 * 70 * 10mm / 10.04 * 2.76 * 0.39in 2#: 290 * 70 * 10mm / 11.42 * 2.76 * 0.39in 3#: 420 * 70 * 10mm / 16.54 * 2.76 * 0.39in Package List: 1 * Protractor Package List: 1 * Protractor