TC Torque Comparator is calibrated on torque testers which are certified using text bars and class F weights traceable to NIST Meets or exceeds GGG-W-686C and ANSI B107. 14M Perfect for a facility where a quick check of a wrench is required before usage Excellent for tool trucks to verify wrench accuracy and avoid unnecessary service Highly accurate from 20% of full scale to full scale 1/2 Male Square drive Large 175 lb.-ft. scale dial with increments every 5 lb.-ft. for easy torque reading Compact design allows for horizontal or vertical mounting No power requirements Economical torque wrench checker