THE UM24 2 Pieces of 8&rdquo;-2 Side Duel Grit Fine/Coarse Combination Aluminum Oxide Sharpening Stone Knife Sharpener (8in x2pc) 2 pieces 8" / per order 2 sided  (Duel Grits: 120/240), Fine/Coarse Combination Aluminum oxide material. Lightweight and easy to carry, package with ATE pro-UM24 Supply Ideal for sharpening knifes, hatches, and all types tools,Great for bench work