Specification: Product name: Precision Screwdriver Material: 45# steel Main color: silver Magnetic: No System: metric system Full length: 90 mm/3.54 inch Head type: cross and flat head Flat head size: 0.6 mm/0.02 inch, 0.8 mm/0.03 in, 1 mm/0.04 in, 1.2 mm/0.047 in, 1.4 mm/0.055 in, 1.6 mm/0.063 inch, 1.8 mm/ 0.071 inch, 2 mm/ 0.079 in Cross head size: 1.2 mm/ 0.047 in, 1.4 mm/ 0.055 in, 1.6 mm/ 0.063 in, 1.8 mm/ 0.071 in, 2 mm/ 0.079 in Application: watch repair, watch battery replacement, remove watch bracelet screw links, eye glasses repair, etc Note: 1.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color. 2.Please allow slight dimension difference due to manual measurement.