Length of 10 cm which will probably allow you to use the tips everywhere. Available sizes: T6, T7, T8, T9, T10, T15, T20, T25, T27, T30 and T40 to meet your different needs Material: S2 alloy steel - Head type: Torx - 11 pieces 100 mm long Torx screwdriver bit set Magnetic Bits - Thanks to magnetism, screws adhere to the bits and can be removed even from the deepest holes without difficulty and without the need to turn or shake the object where they are located, improving your work efficiency. Shank Type: 6.35mm/1/4" Hex. These magnetic bits attract screws. They can be used with manual screwdrivers, electric screwdrivers, or electric drills.