11 pieces - Screwdriver bits - Screwdriver bit set - Long Torx screwdriver set - Hollow Torx bit set - S2 steel - with security head - hexagon shaft

【Long Screwdriver Bits】T6, T7, T8, T9, T10, T15, T20, T25, T27, T30, T40, 11 in 1 Professional Size security driver bits set. Size is clearly engraved on the shank for easy identification. 【Widely Applicable】1/4” inch hex shank and 4 inches (100mm) length. Can be used with electric screwdriver, manual screwdriver, electric drill, general tool set, air and other standard bit holders. 【S2 High Quality Steel】Made of S2 high quality shockproof tool steel, a hard and wear-resistant alloy metal. Head surface for steel material color, from inside to outside are the same. 【Magnetizable Head】Magnetizable security head (new bits with weak magnets). After magnetized with a magnet, it would with a strong magnetic, can easily suck the screws when using. 【Excellent Workmanship】This security tamper-resistant star bit set, exquisite workmanship, each edge can be accurately locked screws, no damage to the screw and screwdriver head. Such a practical helper in many situations.