[CR-V Material]: This screwdriver set is made of high quality CR-V material, impact and wear resistant, sturdy and durable, and has a long service life. [Surface plating treatment]: This screwdriver tool adopts surface plating treatment, resistant to rust and corrosion. [Different Specifications]: This screwdriver set includes 10 different size screwdrivers, which can easily meet your different needs. [Scope]: This screwdriver tool set can be used for the maintenance of laptops, watches, toys, glasses and other electronic equipment tools. [Small and light]: This screwdriver tool set is small and light, easy to use, easy to carry, and does not take up space. Features: Condition: new. Item Name: Screwdriver Bits. Shank diameter: approx. 4 mm. Length: approx. 28 mm. Quantity: 10 pieces. Material: CR-V surface plated. Type: T3, T4, T5, T6, T7, T8, T9, T10, T15, T20. Weight: about 24 g. Content: 10 screwdriver bits. Note: 1. Measurements are taken by hand, so sizes shown may vary slightly. Thank you for your understanding. 2. The color of the item may be slightly different from the actual item. Please take the real one as the norm.