Unmounted Silicone Polisher, Knife Edge, Pink, Extra Fine Grit, 12 Pack | POL-310.40 Great for deburring, cleaning, smoothing and polishing gold and other metals Impregnated with silicon carbide Made in the USA Pack of 12 pink, extra fine grit silicone polishers Knife Edge shaped tip; 7/8 inch by 1/8 inch