These frankfurts are designed for use on automatic or radial arm polishing machines, commonly used in granite shops and monument factories. They achieve a high degree of mechanical polish on marble, granite, terrazzo, and concrete. Featuring very thick 1 inch resin segments, these bricks are extremely durable and have a longer tool life, in comparison with synthetic resin or magnesite bricks. "Quickchange" style simplifies tooling changes and saves time Frankfurt-bricks. They are available in a full range of grit sizes, from 50 to 8500. They may be also used dry for concrete polishing applications.