Deflecting beam torque wrenches work by applying torque to a deflecting beam rather than a coil spring. With no wearing parts, the unique design ensures accuracy of +/-2% throughout the range of the wrench.
Warren & Brown Deflecting Beam Ratcheting Torque Wrench
Warren & Brown deflecting beam torque wrenches are the best value and most accurate torque wrenches money can buy. The ratcheting version is fantastic for situations where bolts are awkward to get to and there is limited room to shift the wrench