Combination Al.Oxide Stone 5/8" x 1-5/8" x 4-1/2"

With 2 grits back-to-back on the one stone. In silicon carbide as a sharpening stone and for ferrous materials above RC35, and aluminium oxide which is a little less aggressive providing a smooth finish and for stainless steel and materials below RC35. (Closely resembles the "India stone").
Material: Aluminium Oxide
Size: 5/8" x 1-5/8" x 4½"
Grit: 120/320