The Performance Tool Precision Bits set is a must-have for anyone who works with electronics or delicate equipment. This set includes 13 precision bits in sizes T5, T5.5, T6, T7, T8, T9, and T10, all made from high-quality S2 steel and heat-treated for extra strength and durability. With 8 additional sizes- T15, T20, T25, T27, T30, T40, T45, and T50- this set covers a wide range of applications, from automotive repairs to household projects. The precise fit of these bits in the screw head makes them easy to use, and the included bit holder keeps the bits organized and easily accessible. We stand behind our product and offer a 100% satisfaction guarantee, so you can buy with confidence. Don't settle for inferior tools- get the Performance Tool Precision Bits set today!