Made of S2 Alloy Steel - Durable and Wear-resistant - 11pcs 100mm Long 1/4" Torx Bits is made of premium S2 steel, 6.35mm hex, which is impact resistant and durable, highly wear-resistant. 100mm Long T6-T40 Hex Shank: 10cm length, the internal hollow design makes it more economical. It comes in sizes 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. Magnetic Screwdriver Bits: Thanks to magnetization, the screws They also adhere to the bit and in deeper holes, there is no need to turn or shake the object to get the screw out, improving your work efficiency. Shank Type: 6.35mm/1/4" Hex, magnetic long bit in the installation can easily suck screws, electric screwdriver, manual screwdriver, electric drill, general tool group. The top has a non-slip hexagonal handle which is easier to use. Wide Application: This screwdriver bit kit is used for electric screwdrivers, hand