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Many modern engines use Torque-to-Yield fasteners that require an additional rotation in degrees after reaching the initial torque setting. This special gauge provides an accurate way to torque these fasteners to the factory specifications. This tool has a male and female 1/2" square drive that is used with a standard 1/2" drive ratchet or breaker bar. The design of the tool allows rotation of the dial, so that it can be set to zero for each fastener.