Wright torque wrench for big engines such as diesels for semi trucks boats machinery or torquing machinery parts for sale BO. THIS IS USED for whatever requires a 3/4 drive. It will pull 550lbs. Of torque and double that if you use a torque multiplier and a cheater bar..but that will require 2 people to pull that kind of torque unless your a strong man .but this was calibrated 5/29/2000 by a snap on truck and was sent out to be calibrated . I'm retired and no longer build engines .in fact I'm going to be selling off all my tools in the next few months .this I just pulled out to get started on the big stuff. I have a 20 ton air over hydrolic press for sale too . It's new almost and was 1200 bucks .selling it for 500 bo. This is a high quality wrench not Taiwan. It China . If you know tools. It's in mint condition too..