TORQUE | Wrench Tt20 4-20 N.M 35-180 Lbft.In 3/8" Drv Part No. | 13831Square Size: 1 2" Very low magnetic signature. Relative Permeability Norbar has launched it's first ever Non magnetic Torque Wrench, which is proving invaluable for medical equipment maintenance, notably in the MRI field. It also has further applications across a range of industries wherever tools have to be used in the presence of a strong magnetic field. Carefully selected and tested materials replace the ferrous components present in standard