Whether you are a building professional or a demanding DIYer, this set of 9 Bosch Professional Torx keys is designed for tasks that do not tolerate imprecision. The hardened S2 steel body ensures a hexagonal profile that will not round off, even under repeated stress. The long-arm design increases leverage, allowing for high torque transmission without unnecessary strain—a real advantage for stubborn screws. The 9 keys are delivered in a dedicated case: each size is identifiable at a glance, without having to rummage through the bottom of a toolbox. A 2-year commercial warranty accompanies the set.