THIS IS A CORNWELL TOOLS 12 PIECE 1/4&3/8&1/2DRIVE TORX BIT SOCKET SET, MOST ARE THE TAMPER RESISTANT TYPE FOUR ARE NOT. THE TORX SIZES ARE T8H, T10H, T15H, T20H, T25H, T27, T30, T40, T45H, T50H, T55H, T60.