12mm BURNISHING RIVETING WHEEL Margin Roller Porosity Remover Hammering German

12mm BURNISHING RIVETING WHEEL MARGIN ROLLER POROSITY REMOVER HAMMER GERMANY Riveting wheels/Margin Rollers are used to burnish or to remove porosity, cavities, marks, pits, scratches or any other imperfections from inside the rings, bracelets, or any other items where these wheels can fit. Works best on Gold, Silver, or Platinum without metal loss. These riveting wheels should be used in rotary handpiece at relatively high speeds with light pressure applied to the surface of the metal. There are 3 sizes - Small, Medium, and Large with head of the riveting wheel/margin roller contains an appropriate number of bearings/hammers thus enabling it to remove various imperfections, as follows: Large - Head Diameter: 120 - 12mm - 12 Bearing Riveting Wheels/Margin Rollers are mounted on 3/32"/2.54mm shanks. Caution: Allow the individual roller bearings on the head of the wheel to do the work by applying light pressure to the surface while moving it back and forth across working area.