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Precision-adjustable torque driver ensures that you apply the exact amount of leverage needed to accurately tighten any gun screw, including action screws and scope ring/mount screws. Adjustable from 15 to 70 in-lb. in 1 in-lb. increments to eliminate guesswork and prevent under- or over-tightening screws - no more stripped threads or broken-off screw heads. The 1/4" magnetic hex drive socket accepts ANY Brownells Magna-Tip bit - plus, 6 bits commonly needed for gun work are included! Ergonomic, rubber-coated handle gives you a secure grip for maximum leverage and even transfer of tightening force. To change torque setting, simply turn the orange collar to the desired setting indicated through the easy-to-read window scale. A self-limiting cam-over clutch "clicks, free when the specified amount of torque is reached, making over-tightening impossible. Each driver is hand calibrated and inspected, and comes with a handwritten certification card.