10cm length which will probably allow you to use the bits anywhere. Sizes available: T6, T7, T8, T9, T10, T15, T20, T25, T27, T30 and T40 to meet your different needs Material: S2 Alloy Steel - Head Type: Torx - Set set of 11 Torx screwdriver bits 100 mm long Magnetic bits - Thanks to the magnetism, the screws stick to the bits and can be taken out, even from the deepest holes, without difficulty and without it being necessary to turn over or shake the object where they are, improving your work efficiency Shank Type: 6.35mm/1/4", Hex. These magnetic bits attract They can be used with manual screwdrivers, electric screwdrivers or electric drills Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.