Size: T6, T7, T8, T9, T10, T15, T20, T25, T27, T30, T40. Drive Type：Torx. The hole in the center in each bit causes it to be tamper resistance. Made of high-quality S2 steel, with sturdy hardened & tempered construction, Perfectly matched to most standard tamper-resistant German-made star 6-point screws.
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