... .100% virgin material About uswe are a professional Chinese manufacturer of tungsten carbide products such as carbide no standard products, inserts ... , mining inserts, indexable inserts shims, drilling bits, drawing dies, cold forging dies, carbide bars, carbide rods, carbide ... , K10, K15, K20,K30, P20, P40,etc. cemented carbide for rock drilling tools ( SGS approved )