ALLEN KEY SET - This set of 10 Allen Keys that are designed to let you turn slotted fasteners with ease. High-quality Steel These keys are made of high-quality alloy steel that makes them sturdy enough to let you perform tough fastening jobs with them. These wrenches are also accurately hardened and tempered to make them durable and wear resistant. Rust Resistant These wrenches possess a brown finish that makes them resistant to corrosion. TORX KEY set - 9 piece torx star tamper proof hex key wrenches Material: S2 Alloy Steel (Higher than the Chrome Vanadium Steel) Size: T10, T15, T20, T25, T27, T30, T40, T45, T50 Total length: Approx. 9cm-16cm Color: Silver gray