Crafted for efficiency and ease of use this hex key set features 22 pieces including both metric and SAE sizes ensuring you have the right tool for a variety of fasteners. The durable keys are made from heat-treated alloy steel and are finished in black oxide which not only enhances their corrosion resistance but also maintains their integrity even under high torque conditions. With chamfered ends for smoother insertion into fasteners and a ball end design that facilitates access at challenging angles this set is designed for both ease-of-use and precision. The high-contrast markings allow for quick identification of each size while the included pivoting holder keeps your tools organized and accessible when you need them most.