Abstract: A torque wrench with a profiled cam lock lever that is movable between locked and unlocked positions over an adjustment knob of the tool. The lock lever includes an off-center pivot pin and a decreasing radius on a cam profile of the lock lever (rounded corner that contacts a housing of the tool when the lock lever is moved between the locked and unlocked positions). The off-center pivot pin increases an amount of force applied to the adjustment knob when the lock lever is in the locked position to minimize and/or prevent unintentional movement of the adjustment knob. The cam profile reduces an amount of force or effort needed to operate the lock lever and decreases rapid release of the lock lever as over center action is reached.