1. LABOR - SAVING RATCHET DESIGN: This aluminum alloy handle multi - purpose screwdriver adopts a 6.2 - degree ratchet labor - saving design, 58 - tooth forward and reverse ratchet structure, saving 80% of labor. The torque is 50N.m/50KG, and there is no need to adjust the wrist position 2. MULTI - BIT SCREWDRIVER SET: Equipped with 40 PCS S2 magnetic chrome - molybdenum alloy steel bits, the bit diameter is 6.35mm (1/4), including PH (4 pieces), SL (4 pieces), Torx (10 pieces), Hex (9 pieces) and PZ (3 pieces), U - type (2 pieces), 8 45mm long bits, to meet professional use needs 3. STURDY ALUMINUM ALLOY HANDLE: The aluminum alloy detachable handle structure can be easily used in various narrow spaces. Super hard hot forged aluminum alloy, assisted by high - precision CNC one - piece molding, ensures durability and oxidation resistance 4. MULTI - FUNCTION HANDLE: The t handle of the small screwdriver set is equipped with multiple functions, allowing for versatile transformations to adapt to various situations. With just one tool, it can efficiently accomplish a wide range of tasks