This quality-plus polisher is more durable than silicon rubber and features improved wear and better flexibility. It is especially popular for polishing delicate areas such as bezels or prongs, and produces an extra-fine finish, from shaping to high-shine, on all metals. Optimum rpm of 5000–12,000 is suitable for most projects. Brand: AdvantEdge Hole size: 1/16" Country of origin: USA Type: Cylinder MSDS