The T4722-2 part of CK Tools is a hardened carbon steel screwdriver set that includes nine pieces. The set includes a slotted-head 2mm screwdriver, four Phillips-head screwdrivers in sizes 0, 1, 2, and 3, four sizes of Torx head screwdrivers in sizes T10, T15, T20, and T25, and one 4mm hex head screwdriver. These tools are coated with a black oxide finish in order to provide protection against rust and corrosion. Additionally, the heat treated, hardened steel construction helps ensure that these tools deliver the highest levels of durability and performance.