【High Quality】All screwdrivers are magnetized and made of CRV steel, which ensures extreme durability. The hardness can be up to HRC52-56 and ensures a long service life. 【Precise Design】The precision screwdriver is equipped with a 3-stage adjustable shaft and a magnetic head for easy handling. The handle is non-slip and fits comfortably in the hand thanks to its ergonomic design. 【Portability】The plastic storage box holds the screwdrivers, is easy to take anywhere, and fixes each screw head to the holder. 【Contains 30 Screwdriver Bits】 Five-star screwdriver bits: 0.8, 1.2; Torx screwdriver bit: T1, T2, T3, T4, T5, T6, T8, T10; Triangular screwdriver bits: 2.0, 2.3; Y screwdriver bit: 0.6, 2.0; Phillips screwdriver: 1.5, 2.0, 2.5; Slotted screwdriver: 1.2, 1.5, 2.0, 2.5, 3.0; SIM card screwdriver tip: 0.8; Allen screwdriver: H1.3, H1.5, H2.0, H2.5, H3.0, H4; U-shaped screwdriver bit: U2.3 【Suitable for many electrical devices】 With this super practical and robust 30-in-1 set, you can