1. 12 Precision Screwdriver Bits Torx: T5, T6, T7, T8, T10, T15 Slotted: 2.0, 3.0. Phillips: PH0. Triangle: 2.3. Triwing bits: Y2.3. U: U2.3. Extension bar extend length from the handle which can be for the screw in the hardtoreach area. 2. Wide Range of Uses The 12 in 1 Adjustable Screwdriver Set can be used for both individual and professional purposes including repairing phones, TVs, computers, laptops, watches, air conditioners, eyeglasses, cameras, printers, household appliances and other electronics. 3. Exquisite design : Electronic screwdriver handle is made of aluminum alloy material, ergonomic design, 8 edges and corners of nonslip treatments. With 360° rotating cap, long time work will not wear hands. Through the design of magnetic suction, it is convenient to change different types of screwdrivers, for you to improve work efficiency. 4. Hard material : Precision screwdriver set is made of hard S2 tool steel, which is more durable and less prone to wear. Each drill bit is strictly quality controlled with precision to help you complete your maintenance work smoothly.