Digital torque wrenches

The torque wrench, or torque wrench, is a precision tool used for the controlled tightening of screws and nuts.
There are different types of torque wrench: snap, dial and digital, the most widespread and used version is the snap version, the latter aesthetically resembles a ratchet and is used with interchangeable bushes depending on the diameter of the part to be tightened. 
The use of this tool is of fundamental importance in order not to damage the thread of the screw and nut, guaranteeing the homogeneity of the load in a mechanical part held in place by different bolted joints.
The units of measurement used to set up this instrument are many, but the most common is the Newton per meter (N / m).