Here you can find Pearl Abrasive's proprietary abrasive grain. Ceramic Bond Technology, or CBT™ these resin fiber discs are made from a non-fused ceramic aluminum oxide grain that is extremely strong and durable. The very fine crystalline structure of this abrasive grain allows the grains to fracture during use, leaving the operator with a constantly self sharpening fiber disc. This Ceramic Abrasive grain consistently outperforms standard aluminum oxide. It ideal for use on stainless steel or where heat could be a problem when operating. Call TAP today to get more info on Pearl Abrasive CBT™ Resin Fiber Discs!