Titan Tools 16113 13-Piece Tamper Resistant Star Bit Set Chrome moly bits for strength and durability 1/4" and 3/8" drive bit holders 11 tamper resistant torx bits: T8, T10, T15, T20, T25, T27, T30, T40, T45, T50, T55 Handy magnetic holder sticks to most metal surfaces Can be used on non tamper-resistant Torx fasteners