?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.