The Ortofon OM Series Mounting Tool is a small & easy-to-use tool designed especially for Ortofons OM series of turntable cartridges. Its purpose is to simplify the process of attaching your cartridge to its headshell on a turntable tonearm. By accurately mounting & positioning your cartridge you will reduce the potential for wear & tear on your vinyl records & stylus. This will also contribute to an enhanced sound quality from your vinyl system.