A torque wrench allows you to tighten a bolt or nut with a specific force, called torque. Setting a specific wrench torque causes appropriate spring tension, allowing the screw to be tightened with the intended force. Torque wrenches are equipped with a special ratchet that engages when the required nut or bolt tightening force is reached. The key has a calibration certificate. Specification: -1/4". -2-24 Nm. The kit includes: - Torque wrench. - User's Guide. - Box.