The Sossner® Number & Letter Stamping Plier is an easy to use marketing tool to identify carat weight inside rings. The engraved wheel has all the markings used to do this in a .75 mm character size. Each plier includes one marking wheel installed. This highly sought after tool is a must for many jewelry makers. Convenient, versatile and made to last. No jewelry bench should be without one! Made in the USA. OPTIONAL: Other wheels will be available upon request for the alpha letters A through M and another one for N through Z. Replacement wheels are available separately.