This is a 12.7mm preset torque wrench. I used it for tightening larger torque areas, such as motorcycle and car wheels, and suspension components, for rough management. It has a calibration hole, but whether it can be calibrated is unknown. I only used it a few times a year. How about it for changing your winter tires this coming season? Size: 1/2 (12.7mm) Setting Range: 42-210 Nm Same-day shipping available.