High quality: our precision screwdriver kit is made of high quality steel, hardened carbon steel shaft, black oxide coating, durable and corrosion resistant. Mini screwdriver set is slim and perfect for small screw design. Precision design: 5-piece screw driver for precision machining. Rotate the handle cover so that you can press the machine by hand to operate the screwdriver easily. Easy to use: standard flat head screwdriver with rotary head, simple and practical. The color-coded cover can quickly identify the size and is easy to use. Different sizes: 1.6 mm, 2.0 mm Y-type 2-size screwdrivers. The material is chromium vanadium alloy steel. Applicable industries: watches, jewelry, glasses, digital electronics, etc. Two functions: 1.6mm can be used to repair the watch crown, and 2.0mm screwdriver is used to repair the watch strap screw. Specification: Material: chromium vanadium alloy steel Size: 10.3 x 0.94cm/4 x 0.37inch Package Includes: 1 piece Triangular Watch case Screwdriver