【PREMIUM MATERIAL】 Heat-treated steel with black-oxide finish, featuring 15 long reach keys and 15 high leverage short keys for durability and strength. | 【HIGH LEVERAGE】 Conventional drive end on both long and short keys allows for high leverage on stubborn fixings, ensuring efficient operation. | 【TORQUE HANDLE】 Comes with a torque handle for added force during loading and unloading fasteners, increasing reach and enhancing torque performance. | 【COMPLETE COVERAGE】 31-piece Allen wrench set with both inch and metric measurements, covering all hexagon socket screws for comprehensive use. | 【EASY ORGANIZATION】 High-visibility size markings on each wrench and a sturdy carrying case for quick size selection and convenient storage.