Drilled tips allow use on tamper resistant security fastenersChrome molybdenum steel construction for strength and durabilityMirror polished chrome plated finish resists corrosionPatent pending textured finish for improved gripColor coding for easy identification and Laser etched size markings are easy to readThis Extra Long Arm Torx® Key Set contains the following sizes: T6, T7, T8, T9, T10, T15, T20, T25, T27, T30, T40, T45 and T50. Lifetime warranty.