Abbot-Robinson #9 Mounted Hard Brush - 9/16" Diameter

Abbot Robinson brushes are the industry standard for high-quality bristles that maintain their shape and stiffness even under heavy use. The Robinson 9 features a "hard" bristle grade and a compact .56 inch (approximately 14.29 mm) diameter for concentrated cleaning and polishing action.

These brushes are excellent for applying polishing compounds into tight gaps, such as under-galleries or between the prongs of a stone setting. The hard bristles provide the necessary resistance to drive the abrasive compound into the metal, resulting in a deeper and more uniform shine.