? Durable, armored synthetic diamond abrasive ? Versatile B99 free-cutting resin bond; use wet or dry; superior form holding ? Use ASD abrasive when carbon and steel are ground in the same operation ? Ideal for tool making and resharpening ? Premium quality diamond produces keen cutting tools that hold their shape, are easier to sharpen, and require fewer reconditionings ? Vitrified bond V99 for most durable under high grinding forces; excellent for wet, offhand finishing of carbide toolsThe 99 line of quality stock superabrasive diamond and CBN (cubic boron nitride) grinding products includes 250+ USA-made, ISO-certified wheels for stock removal to tight-tolerance, precision finishing applications. Available in resin, vitrified, metal and MSL (metal single layer) bonds.