28in1 ELECTRIC SCREWDRIVER

A 28-in-1 electric screwdriver is a cordless, precision tool kit typically featuring a pen-shaped motorized handle, 24 interchangeable magnetic bits, and various accessories like prying tools and magnetizers. These kits are specifically designed for the delicate disassembly and assembly of small electronics such as smartphones, laptops, and watches. 

Common Product Features

• Dual Working Modes: Most models support both automatic and manual operation; the motor handles fast driving (often up to 200 RPM), while manual mode allows for precise final tightening or breaking loose stubborn screws.
• Integrated LED Lighting: These tools usually feature 3 to 4 shadowless LED lights at the tip to illuminate dark or cramped working areas, ensuring high visibility for small screw heads.
• Rechargeable Battery: Built-in lithium batteries (typically 350mAh) are charged via USB Type-C; a full charge can typically drive between 300 and 400 precision screws.
• Ergonomic Design: The bodies are often made from an aluminum alloy with a slim, pen-like shape and a non-slip matte finish for comfortable one-handed use. 

Precision Bit Specifications

The 24 included bits are usually made from high-hardness S2 alloy steel (up to 60 HRC) to prevent stripping. Typical bit sets include: 

• Phillips: PH000, PH00, PH0, PH1, PH2.
• Flathead: SL1.5, SL2.0, SL3.0, SL4.0.
• Torx/Security: T2, T3, T4, T5H, T6H, T8H, T10H, T15H.
• Specialty Bits: Pentalobe (P2, P5) for Apple devices, Tri-point (Y1), Triangle (2.3), and U-type (U2.6).