This 13 Bit Reload Pack refill is designed to work with the Technicians 26 in 1 Ultra Driver. Each bit is double sided for a total of 26 different bit sizes. They are made from hardened and tempered CVM tool steel for long lasting strength and durability. Components: TORX: T6, T7, T8, T9, T10, T15, T20, T25, T27, T30 Phillips: #0, #1, #2, #3 PoziDriv: #1 & #2 Square: #0, #1, #2, #3 Slotted: 3.0, 4.0, 4.5, 5.5, 6.0, 6.5