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The dial indicating screwdrivers are designed for torque evaluation
and verification. It can be used to monitor torque as it increases
or decreases or display peak torque applied. Dial indicating screwdrivers
measure torque through the use of known twisting force needed to
distort a torsion bar. The amount of torque applied is measured
on a dual dial. This tool can be used in two ways, it can either
be set in track mode so it can constantly track the applied torque
or set in memory mode, which is done by withdrawing the slider and
resetting the bezel ring to zero before using. This tracks the applied
torque as before, but leaves the memory pointer at the maximum torque
position.
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