Designed for surface and edge grinding. The fiber backing strengthens the abrasive disc and improves stock removal. For aggressive grinding with maximum stock removal rate on hard materials which do not conduct heat well. Consistently high performance due to self-sharpening ceramic oxide grain. Active grinding additives in the coating substantially improve the stock removal rate, prevent loading, and result in cooler grinding. The CDR clamping system has a threaded connection with male thread (plastic). Also compatible with the following commonly used systems: Roloc™, Lockit, Speed Lok TR, Power Lock Type III, Fastlock-System B, Roll-On.