R.P.T. (Rounding Prevention Technology) Star and hex bit sockets are designed to replaced standard star and hex tools. Sizes Included - T8, T10, T15, T20, T25, T27, T30, T40, T45, T47, T50, T55, T60, T10H, T15H, T20H, T25H, T27H, T30H, T40H, T45H, T50H, T55H,E4, E5, E6, E7, E8, E10, E12, E14, E16, E18, E20, 1/8, 5/32, 3/16, 7/32, 1/4, 5/16, 3/8", 4, 5, 6, 7, 8, 9, 10mm short and long hex.