A line of Class F cast iron grip handle weights for use by installers, service technicians and state and local officials to calibrate all types of commercial weighing equipment, including legal-for-trade scales is available from Alliance Scale, Inc. of Canton, Mass. Alliance Grip Handle Weights are ideally suited for validating the proper setup of scales and spot checking before a work shift begins to identify problems prior to scheduling maintenance. Providing full NIST traceability, they come in 10 to 100 lbs. sizes; offered in inch, metric and troy ounces. Developed for testing commercial scales, Alliance Grip Handle Weights are Class F cast iron painted, density 7.2 for scale calibration and they are finished with a special etching process, and then coated with a chip-resistant paint that conforms to NIST Handbook 105-1 standards.