A Set of 17 torx bits made from Chrome Vanadium Steel. Includes Chrome Vanadium 1/2″ inch adapter. All of the bits share the same 10mm diameter hex base which allows faster bit changes. Each bit has its size imprinted on it making it easy to identify them after youve removed a handful from the case. And to make tidying up quicker the case displays the bit sizes next to each housing. 30mm Length Torx Bits: T20, T25, T27, T30, T40, T45, T50 and T55. 75mm Length Torx Bits: T20, T25, T27, T30, T40, T45, T50 and T55. 1/2″ Drive Socket. Made from Chrome Vanadium Steel. Supplied in a Blow Moulded Case.