1/2″ 25-250 Ft Lb Torque Wrench - IRISH TOOLS SHOP (National Institute of Standards and Technology). Calibrated to +/- 3% 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. Micrometer Torque Wrench KT 1/2dr Torque Wrench 50-250FT.LB/NM Proto Torque Wrench Proto J6014C J6014C 1/2DR TORQUE WR 50-250 FT/LBS PROTO. Our Part #201-509. Condition:New. Mfr Part #J6014C. Proto J6014C... Calibration is accomplished by mechanical loading each wrench in a horizontal position Stanley J6014CXCERT Proto 1/2-inch Drive Ratcheting Head Micrometer Torque Wrench 50-250 ft. OEMTOOLS 25695 1/2 Drive 20-250'/lb Torque Wrench (National Institute of Standards and Technology)