HIGH QUALITY MATERIAL: All bits are made of high quality CR-V steel by vulcanization, it's hardness can reach over HRC62°, which is harder than the ordinary steel material and more durable, all of standard size bit undergo the rigorous quality control testing, the tip is stable and not easily stripped.
HUMANIZED DESIGN: Ergonomic and press & push design handle, it is comfortable to hold even for the long-time use. For the bits that are often used in repairing electronic products, have 2pcs or 3pcs or 4pcs in this set, allows you to avoid damage due to repeated use need to buy a new replacement, save your money. And this precision set comes with a storage bag which is made from oxford, offering a whole protection, easier storage and carrying.