The Real Avid Smart-Torq adjustable torque driver sets fasteners to spec so you don't over-torque optic and mount screws. It clicks at the set value and adjusts in precise 1 in-lb increments for repeatable results. Features: Adjustable click-style torque driver Adjusts in precise 1 in-lb increments Force Assist technology Rubberized ergonomic grip Includes a bit set covering most optic ring and base brands Prevents over-torquing optic screws when mounting rings, bases, and rails.