These torque wrenches are preset for RiekeŽ Hex-Head plugs. The preset torque value is clearly stamped on the handle, and the different wrenches come in different colors for your specific gasket and torque needs. These wrenches will fit steel and plastic plugs, and helps comply with U.N. packaging requirements. The wrench handle "slips" slightly to let you know when preset torque has been reached. Be sure to follow the container manufacturer's closing instructions in order to be in compliance with the container supplier's torque requirements.