Proto 3/4" Drive Ratcheting Head Micrometer Torque Wrench 60-300 ft-lbs. with NIST Certification

• Calibrated to +/- 4% in clockwise direction and +/- 6% in counter clockwise direction.
• Calibration is accomplished by mechanical loading of each wrench in a horizontal position, and performing a three click test at 20%, 60% and 100% of maximum instrument capacity.
• 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.

Specification

• Country of Origin: United States of America