Made of S2 Alloy Steel - Tough and Wear Resistant - 11 x 100mm long 1/4" Torx bits is made of premium S2 steel, 6.35mm hex, which is impact resistant and tough, very wear-resistant. 100mm long T6-T40 hex shank 10cm length, internal hollow design makes it more labor-saving. These are T6, T7, T8, T9, T10, T15, T20, T25, T27, T30, T40 sizes to meet your different needs, compatible with electric screwdriver, hand screwdriver, air drill, impact driver , etc. Magnetic screwdriver bits: thanks to the magnetization, the screws also stick to the bit and in deeper holes, it is not necessary to turn or shake the object to pull out the screw, which improves your work efficiency. 6.35mm/1/4" Hex Shank Type, Magnetic Long Bit in the installation can easily suck screws, electric screwdriver, screwdriver manual, electric drill, group of general tools. The upper part has a non-slip hexagonal handle which is easier to operate. Wide Application This screwdriver bit set is used for electric screwdrivers, hand screwdrivers, air drills and so on. following. Suitable for professional maintenance professionals, computer maintenance, camera maintenance, manual electric screwdriver. Features: Material: S2 steel. p> Stem type: approx. 6.35 mm / 1/4" hex. Head type: Torx Overall length: 100mm. Quantity: 11 pieces. Size: 100mm (T6 T7 T8 T9 T10 T15 T20 T25 T27 T30 T40). Contents: 10 Torx screwdriver bits 100mm. Please note: Since measurements are taken by hand, the sizes indicated may vary by 1-3 cm. Make sure you don't mind. Because cinema techniques, ambient light, display color and other reasons may cause a slight color, the final color should be decisive. Thank you! Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there are will have some color difference, depending on the physical object received Delivery Quantity: (according to the main image)