Torque Wrench, 1/2Dr, 50 250 ft. lb.

Calibrated to +/- 3% in clockwise direction and +/- 6% in counter clockwise direction Calibration is accomplished by mechanical loading each wrench in a horizontal position Certification documents traceable to N.I.S.T. (National Institute of Standards and Technology) Manufactured to meet precision/highly accurate applications such as military and aerospace, Weight: 5.78 Pounds, Manufacturer: Stanley Proto