Precision Instruments started in 1938 to pursue the manufacture of the first torsion bar dial type wrenches - the first type of torque wrench as we call them today. The company continued to advance their design of torsion bar dial type wrenches with increased accuracy. In 1969 Precision Instruments marketed torsion bar standards for use in torque testers. With their persistance, they paved the way for portable testing of torque wrenches in the field. In 1974 Precision Instruments successfully launched the split-beam click type torque wrench. This manufacturer truly has a long history of quality and innovation. For more information see their products we have for sale below, visit Precision's website or call them at 847.824.4194.