Alumina Zirconia mineral with a grinding aid provides more cutting power than aluminum oxide across all metal types * Flaps combine grinding and blending into one step for time savings * Durable Y-weight polyester-backed flaps provide longer life on high-pressure applications such as sharp-edge work and beveling * Quick change disc simplifies disc changes and does not require hand tools * Angled, Type 29 disc provides aggressive stock removal and fast cutting on both flat and curved surfaces