Boride Cs Wx Series Stone Set 6 X 1Boride CS WX Series 5 Stone Set includes five 6" silicon carbide sharpening stones: F150, F220, F400, F800, and F1200 grit. Boride CS WX Series stones are premium sharpening stones made of silicon carbide in a hard vitrified binder. Designed for slow breakdown and long service life, CS WX combines aggressive cutting speed with a more controlled sharpening feel than conventional coarse silicon carbide stones. Unlike Boride CS HD, which is optimized