BES 6PCS Precision Magnetic Screwdriver Set Disassemble Repair Tools S2 Steel Screwdriver Bits Aluminum Handle BST-9900S Electrical Screwdrivers Bits are made of high quality S2 steel, high hardness and excellent toughness Can be used to dismantle all kinds of mobile phones and other electrical appliances. Like Macbooks, Desktop PCs,iPhone,iPad, Electronic Products Digital Products and so on. Handle made of high class stainless steel, anti-acid, impact resistance.Ergonomic handle for easy and maximum torque,the top is rotatable. The tip which have not been used for a long time nor won't rust. Equipped with a carry box,lightweight and portable,easy to store.