Sturtevant Richmont Digital Torque Testers are ideal when torque tools need to be calibrated. They are excellent testers for intermediate checks of all types of tools. They have the accuracy for calibration of clicker and camover-type torque wrenches and clutch-type torque screwdrivers.Sturtevant Richmont Digital Torque Testers can test and calibrate tools down to within +/- 2% accuracy because it is accurate to +/-.5% of indicated value. Sturtevant Richmont Digital Torque Testers are versatile, reliable, highly accurate, durable, and easy to use. Nothing is worse than a tester out of calibration. Sturtevant Richmont Digital Torque Testers tell you when the tool last calibrated and when it is due next.