Value pack: This bit set includes 30 pieces T20 bits. It is an ideal choice to meet your daily consumption. Quality: These bits are constructed from heat treated chrome vanadium steel, offering superior durability, and are precisely machined, greatly reducing the risk of bit shear. Compatibility: the 6-Lobe 1/4" shank hex bits clicks onto most standard sockets, screwdrivers, drill/driver kits & power tools attachments. Wide application: T20 is one of the most commonly used screwdriver size, which is wildly used in automotive repairs, electronics, home appliances, toys, consumer electronics and so on. Storage box: the set comes with a small plastic box to prevent loss.