New Harmony Music - 10 mm Endpin w/23.5 mm Fittings

Can be used to replace 10 mm end pins by removing the steel end pin and inserting the carbon fiber end pin. As long as the thumb screw is not tightened excessively, a carbon fiber end pin can be used for years in a standard cello end pin fitting. However, the fittings designed for these 10 mm end pins hold the end pin firmly, but can not damage the end pin regardless how tightly the thumb screw is tightened.