Proto Micrometer Torque Wrench, Series: CXCERT, 1/2 in Drive, 16 to 80 ft-lb, Head Ratcheting, Graduations: 0.5 ft-lb, 15-1/2 in Overall Length, CW/CCW Rotation, +/-3% CW, +/-6% CCW Accuracy, Audible Click Indicator, Specifications Met: ASME B107.300-2010, TO33K6-4-2193-1, Steel, Full Polished

ITEM FEATURES:

• Calibrated to +/-4% clockwise direction and +/-6% counter clockwise direction
• Calibration is accomplished by mechanical loading 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 NIST(national institute of standards and technology)