Features:1. PREMIUM Material - The screwdrivers are made of high-quality S2 steel, with high hardness, wear resistance and impact resistance, the surface adopts sandblasting process, durable for a long time.2.STRONG MEGNETIC - Easy to hold screws, convenient to use in many working scenarios, especially in tight space, clearly engraved characters for identification.3. High precision--The precision is strictly controlled in the production process, perfectly match the screws, not easy to slip and curl, the bits are straight and concentric, effectively reducing the sway of the bits.4. Wide Application-Widely used in pneumatic screwdriver, electric screwdriver, cordless screwdriver, impact drill or any other electric drill with 1/4 inch hex chuck. Specification:Material:SteelColor: As the picture shownSquare head: Length 50mm/100mmModel: SQ1,SQ2,SQ3Package Contents: 3*ScrewdriverNote:1. Due to the problems of lighting effects and shooting angles, there will be some tolerances in the product, please understand.2. Due to manual measurement, the product has a certain size tolerance.