The four most important requirements of a torque wrench, accuracy, reliability, durability, and low ownership cost, are combined into these exceptional tools. Accuracy is literally ground into the Wrench. The special alloy steel beam is ground to a rate of deflection with the use of dead weights, rather than a dimensional tolerance. This process is time consuming and very labor intensive, but the result is a tool that remains accurate as long as the beam in intact and the pointer is on zero under no-load condition.

The flat shape of the beam insures the Wrench remains at a right angle to the Fastener, reducing or eliminating side-loading error. This unique taper-grinding distributes stress evenly along the entire length of the beam, extending tool life indefinitely. With a minimum of moving parts, these tools are virtually repair and maintenance free. M Series Features:

Incredibly durable design – actual service life frequently measured in decades!
Very low cost of ownership – exceptional accuracy retention permits extended calibration intervals, and they are virtually maintenance and repair free!
Ideal for prevailing-torque and destructive testing applications.
Low mass/low inertia design of pointers helps eliminate reading distortion.
Memory feature consists of fingers which follow a track in the scale and remain in place to indicate maximum torque achieved.
Peak torque indicated on scale is accurate, even on destructive testing applications.
Pivoted handle concentrates load at precise point on lever to assure torque accuracy.
Meets or exceeds ASME B107.300 and ISO 6789.
Accuracy of all flat beams is +/- 2% of indicated value from 20% to 100% of accuracy, in both directions.
Includes free ISO/IEC 17025 tabulated certification!