Check the listing for details. Plastic 4” Dia. Metaullics Master Dater Round Wheel Calculator. Condition: Used. Listed at 5.00 USD. The Plastic 4" Dia. Metallics Master Dater Round Wheel Calculator is a versatile hand tool used for various measuring tasks in the business and industrial sectors. This calculator features a durable plastic construction with a 4" diameter round wheel design, making it easy to handle and precise in its measurements. The metallics master dater function allows for accurate calculations, making it an essential tool for professionals needing to take precise measurements and calculations in their work.