Lisle Torx drive bit set. 9 piece set includes sizes T-10, T-15, T-20, T-25, T-27, T-30, T-40, T-45, and T-50. T-10 to T-30 are 1/4" drive, and T-40 to T-50 are 3/8" drive. All torx bits are made of heat treated alloy steel, and come in a convenient vinyl holder.