Desired torque value is pre-selected by use of a micrometer type scale. When exact torque level is reached, wrench releases with an audible "click". Wrench resets automatically to same torque setting. Ball bearing-mounted release mechanism eliminates accuracy variations between slow and fast loading. Color-coded English and Metric markings. Positive locking mechanism helps prevent accidental changes in torque values. Comfortable, secure ergonomically designed grip.