1[31PCS Screwdriver Bit Set] Includes 30PCS screwdriver bits (25mm) and 1 connecting rod (60mm). This set is designed to meet all your screwdriving needs for different tasks and projects. 2[Multi Specifications] Includes PH0, PH1, PH2x2, PH3, PZ1, PZ2, PZ3, T10, T15, T20, T25, T27, T30, T40, H3, H4, H5, H6, SL3, SL4, SL5, SL6, 2.6, S1, S2, U6, U8, T20(with hole), T25(with hole). 3[S2 Alloy Steel Made] Made from S2 alloy steel, ensuring excellent hardness and durability. Each bit is carefully crafted to ensure reliable performance, ideal for professional use. 4[Convenient Design] The driver bits set comes with a connecting rod that allows you to easily connect and disconnect the screwdriver bits. 5[Easy Carrying] The set has a portable storage box, making it easy to carry and store, ensuring you have the right tools whenever and wherever you need them.