There is no substitute for accuracy, especially when taking your once-in-a-lifetime shot. Having a correctly mounted scope is an important step in achieving that accuracy. Wheeler's Digital F.A.T. (Firearms Accurizing Torque) Wrench eliminates "good enough" guess work when mounting precision optics. Applying accurate and repeatable torque settings to scope bases, rings, and actions screws helps in achieving consistent accuracy. Over torquing screws can damage your optic or result in stripped screws or broken screw heads. The large torque setting range of 15-100 in-lbs. and the audible and visual indicators will help you tighten screws to factory specifications. The Digital F.A.T. Wrench includes 10 bits that are made from phosphate-coated S2 tool steel that has been hardened to 56-58 Rockwell C. The included custom-molded case is perfect for storing the wrench and bits when not in use.