Torque wrenches

Dynamometric

— wrenches with built-in dynamometric mechanism, which allows limiting the force on the fasteners. The principle of operation of such a tool is as follows: as long as the tightening force does not exceed the specified value, the key works as usual, and if the resistance of the fastener increases and the force increases beyond the specified value, the working part remains in place and the handle starts to turn idle. The working part itself is usually a landing square for interchangeable end heads (see "end"); the installed head is obtained directed perpendicular to the handle.