Basic Specifications Number of pieces: 12 integrated pieces. Type: Integrated wrenches with a fixed head that supports the ratchet mechanical feature (Fixed Head Ratchet). Color/Coating: Black Nickel, resistant to rust and corrosion. Swing Arc: Only 5 degrees, making it easy to work in tight and confined spaces. Ratchet: Contains 72 teeth to ensure smooth and precise movement during tightening or loosening. Available Sizes in the Set The wrenches are based on the metric system and include the following sizes: 8 mm 9 mm 10 mm 11 mm 12 mm 13 mm 14 mm 15 mm 16 mm 17 mm 18 mm 19 mm