Torque KnobOver compression is the biggest problem experienced in this industry. Most of the elastomers gaskets are already damaged even before they are being used. Think about the life expectance of a gasket that is over compressed. The Torque Knob prevents over compression by setting a Torque limit. The Torque Knob is an easy tool to use. It fits almost all Wing Nuts depending on the gasket material you can chose the specific Torque in Nm. Turn until it starts