These platinum blue 4" x 40 ply, 3 row stitched buffs are more aggressive and longer wearing than yellow and plum buffs. Chemically treated to be stiffer and more durable. Ideal for cutting and polishing platinum and other hard metals. Optimize the effectiveness of all platinum compounds, providing a higher polish in less time than conventional buffs. Made of premium-weave muslin with combed edges with leather pin hole centers. Made in USA.