1. Made of alloy steel Strong and wear resistant, 11 Torx bits 100mm long is made of premium steel, hexagonal, which is impact resistant and tough, very wear resistant. 2. 100mm long T6-T40 hex shank 10cm length, internal hollow design makes it more economical. It is size T6, T7, T8, T9, T10, T15, T20, T25, T27, T30, T40 to meet your different needs, compatible with electric screwdriver, hand screwdriver, air drill, impact driver , etc. 3. Magnetic Screwdriver Bits Through magnetization, the screws also adhere to the bit and in the deeper holes, there is no need to turn or shake the object to take out the screw, which improves your work efficiency. 4. Rod type 100mm, magnetic long bit in the installation can easily suck screws, electric screwdriver, manual screwdriver, electric drill, general tool group. The upper part has a non-slip hexagonal handle which is easier to use. 5. Wide application This screwdriver bit kit is used for electric screwdrivers, hand screwdrivers, air drills and so on. Suitable for professional professional maintenance, computer maintenance, camera maintenance, manual electric screwdriver.